Relation Between Health and Human Right - myassignmenthelp.com

Question: Is there a connection among wellbeing and human rights? Answer: The human appropriate for the social insurance implies every single individuals reserving the option to benefit the best nature of physical and emotional wellness. It incorporates access to all human services administrations, for example, drugs, legitimate sanitation, adequate food, lodging and a decent situation. Medicare, an administration wellbeing plan gives the general social insurance to the Australian resident and the changeless occupants. Medicare covers a scope of administration for an almost no expense or no expense (Nicholson et al., 2012). The human right to wellbeing guarantees a sound and flawless social insurance assurance for every person. Each individual has the option to get the consideration for wellbeing they need and legitimate day to day environments which empowers the individuals to remain sound. The social insurance must be given to the individuals to help people in general. Social insurance experts deal with the human rights and the warmth issues which help them in advancing the wellbeing states of the average citizens (Britt et al., 2013. The wellbeing approaches and projects are utilized for advancing the human rights. These approaches can likewise be abused or damaged in their structure and execution in the human services framework. There are a wide range of kinds of associations between social insurance and human rights. The unfair practices in the medicinal services framework are a danger to the physical and mental social insurance. The infringement of the human rights is the greatest issue in the structuring the approaches and during executing the wellbeing arrangements (Hunt, 2006). All through the world a large portion of the individuals dont approach the essential mental and physical human services. A portion of the individuals dont have any entrance to the medicinal services because of absence of economy. Infringement of human rights is one of the reasons for unexpected frailty care conditions (Ivanov, Oden, 2013). The duties of patients incorporate the activities which are required for the patients that the human services suppliers can gives. They can make appropriate consideration, address precise necessities of the patients and keep up a decent social insurance office. The connection between the human rights and the medicinal services rehearses is vey emotional. The wellbeing arrangements cause the solid positive and negative effects on the social insurance. From the above conversation, it tends to be reasoned that the advancement and insurance of wellbeing requires a solid endeavors for the assurance of human rights and pride. Notwithstanding this a legitimate consideration of the wellbeing should be possible by the satisfaction of the human rights and its social determinants. It can likewise be said that a legitimate human right is fundamental for the best possible social insurance treatment and the other way around. References: Britt, H., Miller, G. C., Henderson, J., Bayram, C., Valenti, L., Harrison, C., ... O'Halloran, J. (2013).General Practice Activity in Australia 2012-13: BEACH: Bettering the Evaluation and Care of Health(No. 33). Sydney University Press. Wellbeing Nursing, vol.30 issue(3), p.231-238. Chase, P. (2006). The human right to the most noteworthy feasible standard of wellbeing: new chances and challenges.Transactions of the Royal Society of Tropical Medicine and Hygiene,vol100 issue(7), p.603-607. Ivanov, L. L., amp; Oden, T. L. (2013). General wellbeing nursing, morals and human rights.Public Nicholson, C., Jackson, C. L., Marley, J. E., Wells, R. (2012). The Australian investigation: how essential social insurance associations upheld the development of an essential human services system.The Journal of the American Board of Family Medicine,25(Suppl 1), S18-S26.

Political philosophy Essay Example for Free

Political way of thinking Essay An English rationalist and doctor viewed as one of the most compelling of Enlightenment scholars. Thought about one of the first of the British empiricists, following the convention of Francis Bacon, he is similarly critical to implicit understanding hypothesis. His work had an incredible effect upon the improvement of epistemology and political way of thinking. His compositions impacted Voltaire and Rousseau, numerous Scottish Enlightenment masterminds, just as the American progressives. His commitments to old style republicanism and liberal hypothesis are reflected in the United States Declaration of Independence. Lockes hypothesis of brain is regularly refered to as the beginning of present day originations of personality and oneself, figuring noticeably in crafted by later logicians, for example, Hume, Rousseau and Kant. Locke was simply the first to characterize the through a progression of awareness. He hypothesized that the psyche was a clear record or clean slate. In opposition to previous Cartesian way of thinking, he kept up that we are conceived without natural thoughts, and that information is rather decided distinctly by experience got from sense observation. THOMAS HOBBES Hobbes was a hero of absolutism for the sovereign yet he likewise built up a portion of the basics of European liberal idea: the privilege of the individual; the regular fairness all things considered; the counterfeit character of the political request (which prompted the later differentiation between common society and the express); the view that all genuine political force must be delegate and dependent on the assent of the individuals; and a liberal translation of law which leaves individuals allowed to do whatever the law doesn't unequivocally disallow. He was one of the organizers of present day political way of thinking. His comprehension of people as being matter and movement, complying with indistinguishable physical laws from other issue and movement, stays powerful; and his record of human instinct as self-intrigued collaboration, and of political networks as being founded on an implicit understanding stays one of the significant subjects of political way of thinking. Notwithstanding political way of thinking, Hobbes likewise added to a differing exhibit of different fields, including history, geometry, the material science of gases, religious philosophy, morals, and general way of thinking.

The Risk of PTSD After a Car Accident

The Risk of PTSD After a Car Accident PTSD Causes Print The Risk of PTSD After a Car Accident By Matthew Tull, PhD twitter Matthew Tull, PhD is a professor of psychology at the University of Toledo, specializing in post-traumatic stress disorder. Learn about our editorial policy Matthew Tull, PhD Medically reviewed by Medically reviewed by Steven Gans, MD on November 17, 2019 Steven Gans, MD is board-certified in psychiatry and is an active supervisor, teacher, and mentor at Massachusetts General Hospital. Learn about our Medical Review Board Steven Gans, MD on November 17, 2019 Post-Traumatic Stress Disorder Overview Symptoms & Diagnosis Causes & Risk Factors Treatment Living With In Children Image Source / Getty Images Motor vehicle accidents (MVAs) are the leading cause of post-traumatic stress disorder (PTSD) in the general population.?? Each year, there are an estimated six million MVAs in the United States, resulting in over 2.5 million injuries.?? According to a National Institute of Mental Health (NIMH) study, 39.2% of MVA survivors develop PTSD. Risk Factors Several factors have been found to increase the risk of developing PTSD,?? including: History of prior traumaPrior psychological adjustment problemsFamily history of psychopathologyPerceived life threat to self or othersLacking social support after the traumatic eventHigh levels of emotion (e.g., fear, helplessness, horror, guilt, or shame) during or immediately after the traumatic eventDissociation during or immediately after the traumatic event Predictors of PTSD Studies of MVA survivors paint a similar picture in some regards. Interestingly, studies have not found much support for the influence of specific characteristics of the accident (such as how severe it was or whether the driver or passengers were injured) on the development of PTSD. Instead, there is more support for the influence of how the person perceives and subsequently responds to the accident. For example, a 2012 study found that the perception that your life was in danger was the strongest predictor for PTSD six months after the trauma. Another study found that avoidance behaviors, the suppression of thoughts about the car accident, rumination about the trauma, and dissociation were most strongly connected with PTSD symptoms two to six months after an accident. A strong perception that your life was in danger during a car accident can lead to avoidance behaviors (for example, not getting in a car or going on the highway), which in turn can increase the likelihood of PTSD. Such avoidance strengthens the belief that driving is dangerous, a thought pattern that can maintain your fear response. The avoidance of thoughts and emotions can interfere with the healthy processing of your emotions, which can also increase the risk of PTSD.?? What to Look Out For It is normal to feel a flood of emotions, including shock, guilt, grief, helplessness, confusion, and fear, immediately following a car accident. However, with PTSD, these feelings dont go away over time and can actually get worse. According to the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), you may have PTSD if you experienced or witnessed a serious trauma, such as a car accident, and develop some of the following symptoms: Avoidance behaviorsIntrusive memoriesChanges in emotional reactionsNegative changes in thinking and mood Any or all of these symptoms may also occur as part of your bodys natural response to a traumatic life event. In people who dont develop PTSD, these symptoms should naturally subside over time. If you notice your symptoms are getting more severe and/or more frequent, if youre avoiding more situations, or your symptoms are beginning to interfere with your life, then you may be at risk for developing PTSD. Symptoms and Diagnosis of PTSD Getting Help There are a number of effective treatments for PTSD. Therapy techniques such as cognitive processing therapy and eye movement desensitization and reprocessing (EMDR) therapy can give you the skills necessary to cope with the emotional and mental part of your experience. Certain medications may also be helpful in managing PTSD symptoms. You can take comfort in knowing that after identifying your symptoms and seeking the appropriate treatment, you can begin to recover. How PTSD Is Treated

Industrial Areas From Centralization And Neoliberal...

With the start of globalization and international expansion cities became a more significant part for various industry sectors. By 2000, more than 500 cities had more than one million inhabitants. According to the United Nations, 54% of the world’s population currently live in urban areas. Urbanization combined with the overall growth of the world’s population could add another 2.5 billion people to urban populations by 2050, with close to 90 percent of the increase concentrated in Asia and Africa. This significant change of urbanization will lead to challenges in satisfying the needs for housing, infrastructure, transportation, energy supply and employment, as well as for basic services such as education and health care . This report will critically discuss three key elements in relation to urbanisation: political economy, economic growth in urban areas and urban sociology. With this discussion, I will argue that the shift in urban areas from centralization and neoliberal globalisation had effected society in different parts of the world differently. Since this essay is only looking at three main aspects, this is not a complete discussion of the matter, but it is intended to provide an insight in the main aspects of economic development in urban areas. POLITICAL URBAN DEVELOPMENT The study of urban politics is the study what occurs on the ground, among people who share the same space for day-to-day living. This makes the study of urban politics particularly challenging

The African American And Hispanic Community Essay

Yes I do feel that the efforts to gain equal rights and right for traditionally excluded people are still incomplete. Society is still suffering from the after effects of slavery. Although, we as a society are looked at as all human beings with the same life value, it is not that simple. The efforts for everyone to be equal has made a tremendous improvement it still has not made enough to say that we are all equal in society. The African American community and Hispanic community are very inferior to the Caucasian community. Society has made it very clear about how they feel about the African American and Hispanic community. The media, television, education are very stereotypical on the â€Å"inferior† communities. The media has depicted African Americans as ghetto, uneducated, Drug lords, crack victims and classless. †¢ Hispanics are depicted as only good enough to be a gardener or maid, that all they do is have a lot of children, and that they stand in front of Home Depot. In television shows or movie films African American characters are more likely to have negative characteristics than Caucasians characters. Negative characteristics such as using vulgar profanity: black people are 89 percent, white people are 17 percent, being physically violent: black people are 56 percent, white people are 11 percent, and lacking self-control: black people are 55 percent and white people are 6 percent. African Americans are given harsher punishments the Caucasians that hasShow MoreRelatedThe African American And Hispanic Community Essay2393 Words   |  10 Pagesenough to say that we are all equal in society. The African Americans community and Hispanic community are very inferior to the Caucasian community. Society has made it very clear about how they feel about the African American and Hispa nic community. The media, television, education is very stereotypical on the â€Å"inferior† communities. The media have depicted African Americans as ghetto, uneducated, Drug Lords, crack victims and classless. Hispanics are depicted as only good enough to be a gardenerRead MoreObesity And Obesity Among Hispanic And African American Communities1701 Words   |  7 Pagesobesity and diabetes among Hispanic and African American populations. The two communities face challenges of contracting diabetes and obesity owing to their lifestyle. There is much to compare among the African American and Hispanic people as far as their culture and observance of healthy living are concerned. The study also presents a future projection of the issues that need addressing to mitigate obesity and diabetes among the Hispanic and African American communities in the United States. 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(Massoglia, Firebaugh, Warner, 2013) It is popular belief, as well as logical, to assume that the rise of African American and Hispanic inmates amongst the prison and jail population is due to a rise in the number of criminals ofRead MoreThe Sentencing Of African Americans1626 Words   |  7 Pages African Americans now constitute nearly 1 million of the total 2.3 million incarcerated; that is 60% of 30% of the African American population. African Americas are incarcerated at nearly six times the rate of whites. â€Å"Between 6.6% and 7.5% of all black males ages 25 to 39 were imprisoned in 2011, which were the highest imprisonment rates among the measured sex, race, Hispanic origin, and age groups. (Carson, E. Ann, and Sabol, William J. 2011.) Stated on Americanprogram.org â€Å" The SentencingRead MoreWhat Is Hpv ( Human Papilloma Virus )? Hpv?1106 Words   |  5 Pageswithin society as a whole. This link can widen racial inequality more than it diminishes racial inequality. Following this further, African American women die from cervical cancer more frequently than Caucasian women. The most common types of HPV in African Americans are 33, 35, 58, and 68, none of which are a part of the Gardasil vaccine (cite this). Also, African American women are less likely to be vaccinated due to the types of HPV that Gardasil protects against because the types most common to thatRead MoreHerritage Assesment1019 Words   |  5 PagesNRS-429V Family Centered Health Promotions Melva Bost RN, MS August 26, 2012 Heritage Assessment The United States has become a multicultural country. Everywhere you look, you see a plethora of cultures that range from Hispanic and African to Asian and American Indian. The varied traditions and beliefs of a multicultural country impact how nurses implement patient-centered care. The best way to provide optimal care in nursing is to become better informed in how different cultures view healthRead MoreProfessional Racism and Discrimination1117 Words   |  5 Pagestowards people of color affects the justice system and violates people’s human rights. The LAPD continues to use racial profiling against mostly African-Americans and Latinos. The use of racial profiling by the LAPD prevents the police from serving the whole community. Because of the LAPD’s neglect towards certain neighborhoods, the neglect causes those communities to not trust or want to work with the police. Racial profiling should not be used by the LAPD because it is immoral, ineffective and unconstit utionalRead MoreThe Epic Of America By James Truslow Adams1533 Words   |  7 Pages In James Truslow Adams’ The Epic of America, the American dream is defined as an egalitarian ideology in which â€Å"life should be better and richer and fuller for everyone, with opportunity for each according to ability or achievement.† Established by an inherently advantaged Anglo American in an era of burgeoning racism, the American dream was and is still believed to provide equal opportunity for all, including minorities who, despite their onerous struggle against discrimination at the hands ofRead MoreTapping the Ethnic Housing Market Essay799 Words   |  4 PagesXXXXXXXXXXX XXXXXXXXX XXXXXX XXXX Tapping the Ethnic Housing Market Opportunities The Biggest opportunities and challenges that lenders and real estate faced through the three ethnicities surveyed, African American, English Hispanic and Spanish Hispanic, is the feeling of ownership among these segments that is between the 79 and 82% (Table A) of the population surveyed (Hawkins amp; Mothersbaugh, 2010), the lack of knowledge when buying a home, and lack of confidence in the process. 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What is your assesment of Hareton, and does he deserve the happiness he eventually finds with Cathy Free Essays

Hareton’s Qualities are described by Nelly Dean as ‘good things lost amoung a wilderness of weeds’ and even Heathcliff admits he is gold put to the use of pavinmg stones’ What is your assesment of this character, and does he deserve the happiness he eventually finds with Cathy? Haretons life was one of cruelty and suffering, with his childhood taken away by the feindishness of Heathcliff. He was described as ‘gold put to the use of paving stones’ but how can such an able boy turn into a ‘swearing’, ‘ rough’ man? Ever since Mr Earnshaw returned from liverpool, and brought back an adopted boy caled Hethcliff, Hindley hated him . Heathcliff had tempers, hit Hindley, used blackmail, and always got him into trouble. We will write a custom essay sample on What is your assesment of Hareton, and does he deserve the happiness he eventually finds with Cathy? or any similar topic only for you Order Now Hindley decided to take revenge on Heathcliff whenever he could, and when Mr Earnshaw died, he received his chance. The land, proporty and inhabitants were all under his control. Hindley ‘trannical personality’ and ‘insane excitement’ was portrayed on the treatment of Hethjcliff. He made him a slve, ‘flogging’, ‘beating’ and ‘swearing’ at him. From that moment on, Healcliff vowed to take retribution on Hindley. Hindley’s wife, Frances, died during the child birth of Hareton Earnshaw, and from that moment on, Nelly Dean decided to be the babies nurturer. Nelly took over as the motherly figure, gurding Hareton from his fathers ‘mad mans rage’ She would lock him in cupbords, ‘stowing him away in the kitchen’ Even Catherine was aware of his ‘violence’ and ‘evil conduct’. Most of this conduct was due to the ever growing drinking problem Hindley had. Any major part in a childs youth has an effect on him later in life, so it is far to say that the poor father figure he had as a child contributes to his orr behavior as an adult. This part of his child hood in many ways acts as a mirro image of Heathcliff’s own life. Yet when he moves to Wuthering heights, not even Nelly is there to help, teach and protect Hareton from Heathcliff. Hareton moved to Wuthering Height when he was just five years old, and thae lack of female figures meant that Hraeton was brought up in a ver masculine way, not to mention the ‘cruelty’ and ‘brutalit’ of Heathcliff. The Height is a key part of Hareton’s life. The propoirty is portrayed by Emily Bronti as ‘violent’,’rough’ and uncivilised. There are many example of characters being changed for the worse after living at the Heights. This is no exception for Hareton. Nelly goes to visit her ‘son’ as she describes him, just ten months later. She arrives with high hoipes for the able child, but they are shattered by the distant view of the ‘elf-locked, brown eyed boy’. Heathcliff’s treatment towards Hareton becomes evident when he throws a rock at Nelly followed by a string of curses. Nelly is probably shocked at this because of the dramatic change from just months earlier. Although Haethciffs conduct with areton is ‘rough’ and ‘violent’ and he treates him like a slave; Nelly askes him if he likes Heathcliff, and ironically, ‘aye’ was the answer. Nelly is quite surprised by this as he also says he hates his real father. This is highlited at the end of the novel when he was the only mourner at Heathcliffs grave. Haretom is always thankfull for what he sees as Heathcliff’s advise. He teachs him how to swear and hate his ‘devil daddy’ Heathcliff aslo takes away Haretons education, telling him to threaten the curate. Later on in thw volume, Heathcliff tells Nelly how he is proud of the way he has treated Hareton, he explains how he treats it as a competition and how he has outdone Hindley. Heathcliff was beaten and treated badly, although he hated Hindley and yet still got educatiomn. Heathciff has outdone Hindley because Haretonm has been beaten and treated badly also, yet he still loves Heathcliff and has no education. He explaons how it is payback ofr Hindley, and maybe this is why Hareton turned out the way he is, because he was ‘used’ and not treated as an adult. It is not fair to say at all that Hareton is in anyway evil or rough, as Heathcliff himself made Hareton. He moulded him into a mirror image of himself, to show revenge on Hindley. Haretonm is doing what every one does naturally, he is growing up, yet he has the disadvantage of having Heathcliff and Hindley to look up to and admire. Hareton is doing what he sees as right, because Haethcliff has taught him that it is right to swera and be rough and violent. Heathcliff realises this, and used the all inportant quote’ he is gold out to the use of paving stiones. ‘ Nelly is astounded by his lack of remorse, even happiness for what he has done: ‘if he were born a fool, I shouldnot like it half as much, but he is no fool. It is aslso argued that the lack of female, and motherly figures in his entire life has conmtributed to his downfall in behavour and consequently sotial status. So again, Heatghcliff has succeeed and overtaken Hindley. Even the lack of female figures is ultimatly becaue of Heathcliff, Healcliff wouldn’t allow any love or education at all. This is true right to the end of the novel when he finds Cathy and Hareton in love. The social status is not only because of the behavour and where he ives, it is also because of the fact that he is treated and acts like a slave or servant. When lockwood visits the Heights, he even mistakes Hareton for a servant and is surprised to find that he isnt. This is aslso to do with the way hie looks. He takes no pride in his apperence and so is seen as low in society. Hareton has quite a minor role in the next chapters in the novel, as leading roles are played by thhe love relationshipo between Linton-Heathcliff and Cathy. Harrton ids only mentioned when in the room, or doing jobs, sometimes he is hihlighted in the many tempers he has, sometimes violenet, sometimnes just the angry rough attitude about whatever he does or says. Hareton is now seemingly going down hill willingly, smoking and swearing more than ever, yet this is not totally correct as we see when he makes an attempt to come across differently for Cathy. Again this reminds us of a mirror image. The young Heathcliff smartened himself up for Catherine, as an attempt to impress her after she called him ‘dirty’ an now Hareton has washed, ‘visible by the glow on his cheeks, and wetted hair’ Although this does not work, as he becomes the center of her ammusement in the next chapter. When Cathy points out to Hareton his name abouvr the alcove of thr door, at wuthering heights, she asks what it means. Hareton, not eduvcated, says he doesn’t know. She calls him a ‘colossal dunce’ and that he ‘looked so stupid. Haretron gets mad, and ‘growls. When Cathy points this out to Nelly, and tells her that it was funny, Nelly scowls at her and tells her off. Nelly points out that she wouldn’t asl be able to read if brought up in his curcumstances. This is absolutly true and makes bold that fact of his upbringing and how it was not his fault. He did not deny his education, he was never given the chpoise to have it. How to cite What is your assesment of Hareton, and does he deserve the happiness he eventually finds with Cathy?, Papers

Why Howard Stern is an Effective Communicator

In the modern age there are two things that can help quantify the effectiveness of an entertainer or a journalist. The first one is fan base and the second one is amount of money earned directly from doing the work of a journalist and entertainer.Advertising We will write a custom essay sample on Why Howard Stern is an Effective Communicator specifically for you for only $16.05 $11/page Learn More Now, using this criteria one can say that Howard stern is an effective entertainer and journalist because he is rumored to inked a five-year deal with Xirius Satellite Radio to the staggering amount of half a billion dollars. A basic computation reveals that his basic salary is $100 million a year. But as one takes away the hype and the distractions and get to the bottom of the issue one can find that at the core Howard Stern is an effective communicator. He was not born an effective communicator but through hard work and a clear understanding of the science an d art of communication he trained himself to become one. Intelligence It is possible for someone to take a look at the sometimes disheveled look of Howard Stern and dismiss him as nothing more than a talkative radio commentator that has nothing substantial to offer. There is so much of reality TV nowadays wherein people without talent and people who did not pay their dues so to speak can go straight to the big stage without going through the process. They say something funny or controversial and then they disappear. However, the mark of an effective communicator is longevity and the ability to influence people. Think of Larry King and Ronald Reagan. There must be substance. Intelligence is almost always the first requirement to be an effective communicator. Howard Stern has the intelligence to grasp information and transform into something that even the average person can understand and appreciate. Beneath the unimpressive exterior is a sharp mind that is waiting to be unleashed. It must be pointed out that Stern is no High School dropout who simply happened to have a talent for speaking into a microphone in a radio booth. He is not just an average opinionated person that one can find hanging around barbershops and public parks eager to speak their mind. Although there is nothing wrong with a non-degree holder who found a way to become a multi-millionaire, it is just important to show that Stern is not just lucky or extremely talented.Advertising Looking for essay on business communication? Let's see if we can help you! Get your first paper with 15% OFF Learn More Stern went through the process just like the average professional who went through school. Stern is a byproduct of higher education. Stern went to Boston University. The Art of Communication He has a degree in communication. He graduated with 3.8 grade average and graduated magna cum laude (Mintzer, p.6). It is impossible to reach this level of academic excellence without learning somet hing about the science and art of communication. In other words the current success that Stern enjoyed did not comes from blind luck but from hard work. He prepared for his role by going through university and learning as much theory as he could about the ability of a speaker to move his audience. College was not the only place that honed his talent. After graduation Stern went into advertising. Knowing what he is capable of doing today and knowing his temperament it is difficult to agree that he enjoyed his time working under an advertising agency. But without a doubt it enhanced his abilities and added to his experience when it comes to connecting with people. One of the things that people may overlook is Stern’s ability to conduct interviews. Every time he conducts interviews he provides a means to show the world why he is an effective communicator in the level of Oprah, Jay Leno, Conan O’ Brien, Larry King and other heavyweights in the entertainment industry and it is about his ability to listen to people. He is very quick with his wit and humor that it is difficult to recognize at first that he has a keen ear to what people said to him. He talks so fast and sometimes speaks while others are still speaking. But if one will look closely Stern has the capability to immediately digest what was thrown at him and in a split second he can throw it back peppered with a commentary or a brilliant question that draws out the best from his guests. Stern knew from the start that comedy is key to sustaining listener’s interest. He completely understood that comedy is a tool that can disarm the most jaded listener. He knew that comedy is the thing that can be used to break the wall that separates people.Advertising We will write a custom essay sample on Why Howard Stern is an Effective Communicator specifically for you for only $16.05 $11/page Learn More During his time in the university he mastered the English language and during his time working in the advertising industry he understood how communication can be used not just for the sake of sending a message but to do so with an end goal in mind. It is not a coincidence that Stern can be compared to a stand up comedian. The purpose is not to become a professional stand-up comic but to entertain his audience. Stern is an effective communicator because he can make his audience stay with him and not lose interest. In other words Stern has created a system around him that enhances his communication skills and make him an effective communicator. It can be said that his experience in the world of advertising has exposed him to the idea that a radio announcer should not just be a voice that powers the message; the listener must see the person in his mind as some sort of a desirable product that they want to acquire. Stern made deliberate steps in order to create Howard Stern as an instantly recognizable brand. One has to understand that Howard Stern as a journalist, an entertainer or as a radio does not always deliver some of the most compelling news items every hour and every minute while he is on air. But this does not mean that the listeners are turned off and would love nothing to do than switch to another show. They stay with him. They will not change their preference because they know that Stern can be relied upon to deliver a level of quality that others cannot provide. Relevance His skill in communication shines through because he does not only speak with a clear voice, he considers his audience. In communication class the first thing that the teacher tries to instill into the minds of students is the concept called common ground.Advertising Looking for essay on business communication? Let's see if we can help you! Get your first paper with 15% OFF Learn More There is no need to elaborate that the common ground between speaker and audience should be the medium of communication. This means that if the speaker uses a different language than the audience, there can be no communication that can take place. The message cannot be transmitted and received by the recipient. Common ground can also be understood as discussing the common interest of the audience and touch on topics that they consider important to their lives. It is no wonder then that Stern talks about current events and the things that directly or indirectly affects the lives of the people who tune in to his program. He becomes an effective communicator in this way because he knows how to connect to his audience. There is no sense in mastering the art of communication if the speaker is not willing to find out what his audience wanted him to discuss. It can be argued that there are two sides to his profession. There is the public aspect which is the five hours a day of radio broadc asting wherein Stern sits behind a microphone and talks about the most pressing issues that Americans face on a daily basis. The second aspect is the less public side of his profession. This is the research, the writing and the amount of effort and time expended to understand the subject matter that he wishes to talk about in his show. There is a tremendous level of hard work that goes into every show. It can also be said that Stern relies on a team of workers and professionals that help him become the best that he could be. Without a team of talented writers, producers, and researchers then it would be difficult for Stern to be updated with current events and know what his audience are thinking. It is difficult for a radio host to receive feedback because most of the time he or she is inside a booth transmitting through the airwaves and yet there is no way to know the reaction of his listeners. It is the job of the support team to provide feedback to Stern. He makes it a point to s tay relevant. It is a major mistake for a leader or a journalist to be non-relevant in a fast-changing world. Stern fights to be in the center of it all. Thus, he has shown incredible range when it comes to the topics that he is willing to cover. He can talk about the Iraq War and at the same time he can talk about Charlie Sheen. Stirring Up Controversy It is a well-known fact or at least to his avid fans that Stern is Jewish. Thus, the listeners immediately conjure images of a person who went to Bar Mitzvahs and frequents the local synagogue. In other words he should be seen as a religious man and a devout member of one of the oldest religions in the world. But this wholesome image does not last long the moment Stern opens his mouth. All of a sudden Stern does something to stir the hornet’s nest, so to speak, by saying some of the most irreverent things that has been said against organized religion. He is not called the â€Å"shock jock† for nothing. Stern has the abi lity to stir up controversy and provoking his listeners to react in a way that increases his popularity or notoriety. The U.S. Federal Communications Commission wanted to make an example of Stern. Aside from the fact that the Howard Stern show was popular and is able to pull in millions of listener per day, the FCC targeted Stern because of the remarks that he made on air. He is an effective communicator not only because of his skills in verbalizing his thoughts but it can also be attributed to his ability to take on topics that people wanted to talk about and yet social norms prevented them from doing so. In a way Stern becomes their spokesperson against corruption, indecency, and hypocrisy. Stern is an effective communicator not because he has a pleasant radio voice that people love to listen to. He is an effective communicator because he compels people to listen to him. He accomplish this by removing limits. There is no sacred cow for Stern and nothing is safe from his sharp comm entaries. His conflict with the FCC is proof that there are times when he goes beyond the limits of decency. And yet again, Stern challenges his listeners to redefine decency. This type of response and the unpredictability of the flow of discussion endears his listeners to tune in every time he is ready to speak. Conclusion Howard Stern is an effective communicator because he worked hard to develop the skills needed to transmit ideas verbally. He is a great speaker. But his effectiveness goes beyond his skills as an announcer. Stern did not only focus on perfecting his craft but went out of his way to understand his audience. As a result he wanted to discuss topics that he believed can connect with people. When he is conducting an interview Stern shows his effectiveness by his capability to listen to what his guests are saying. He is a listener. Using his skills and knowledge about the science and art of communication Stern has created a system that enhances his skills and enable hi m to draw listeners to him and in a compelling manner entices them to stay a little longer. Work Cited Mintzer, Rich. Howard Stern: A Biography. CA: ABC-CLIO, 2010. This essay on Why Howard Stern is an Effective Communicator was written and submitted by user Vincent T. to help you with your own studies. You are free to use it for research and reference purposes in order to write your own paper; however, you must cite it accordingly. You can donate your paper here.

The Irony of Clemencia’s Story Professor Ramos Blog

The Irony of Clemencia’s Story Gracen Slover ENGL 101 10 July 2019 The Irony of Clemencia’s Story In the short story, â€Å"Never Marry a Mexican†, by Sandra Cisneros, we are introduced to Clemencia, a woman who tells us her love and life story through past and present experiences. She isn’t living the life she’s always dreamed of, with a husband who loves and cares for her. This makes her feel helpless and that she will never marry a man and it shapes her mentality and her life aspirations. Clemencia starts off by expressing her anger and resentment for her mother, who was an adulterer. She retells many details from her life that she uses to victimize herself and gain some type of sympathy from others and more importantly, from herself. Although, it is revealed that she is indeed doing things just as bad or the same as what she said she hated her mother for. Clemencia isn’t able to step back and notice she is what she hates and is doing many things that others have done to her that she did not like. As she retells her story, many key pieces that she makes important, show irony and reveal her true colors. Clemencia had lived with her mother, father, and siblings during her childhood. Until, her father became ill and was soon dying quickly and in the hospital. During these heartbreaking weeks, Clemencia’s mother was off having an affair with a white man named Owen and was nowhere to be found while her husband was dying. Clemencia was so angry and shocked by her mother’s actions that she even refused to stand next to her, while her father passed away. After Clemencia’s father died, her mother quickly married Owen and moved him and his kids into her family’s house. This made Clemencia despise of her mother and think of her as nothing but an adulterer, who didn’t care one bit about her father’s death; and now her own children. Her mother seemed to disconnect herself from her previous life, and didn’t pay very much attention to or care for her real family. Clemencia never forgives her mother for what she has done or for how much she’ s ruined her and her sibling’s life. When Clemencia was a little older, she fell in love with a married man, Drew, who was her teacher at the time. She ends up living her life as this man’s mistress for many years, while his wife, Megan, lives like she has no clue that it’s happening. It is ironic that she hates her mother for sleeping with a man while she’s married, but in the future sleeps with a man who has a wife and family of his own. Research has shown that people turn into what they focus on, â€Å"Your mind is a very powerful thing†¦ and you become what you think about† (Peterson). She expressed her hatred for her mother because she has ruined her family, but later on in life she ruins another family for her own pleasure. The tables have turned and Clemencia takes no responsibility for her actions. She thinks she has done nothing wrong, and wants to put the blame on her mother who did the same thing; ruined a family for her own satisfaction. She may think she is doing nothing wro ng, because she isn’t married herself and isn’t being an adulterer. But, she is the one helping the man be one and is tearing a family apart to fulfil her wants and needs. Clemencia is oblivious to the wrong she’s doing and thinks she’s taking care of this married man. She says, â€Å"I just want to reach out and stroke someone, and say There, there, it’s all right, honey† (Cisneros 83). Clemencia has no thought or care for Megan as she sleeps with her husband for years and years. She only thinks about herself and what she wants from Drew, which shows as she says, â€Å"I haven’t stopped dreaming you. Did you know that? Do you think it’s strange? I never tell, though. I keep it to myself like I do all the thoughts I think of you† (Cisneros 78). You can tell by the way she speaks about him, like there’s not a care in the world about anyone else, especially his wife. But, she can hate her mother for doing exactly as she’s doing. As I mentioned before, Clemencia met Drew when she was his student, at around the age of 18. He was obviously intrigued by her and wanted her for his own. At the same time, Clemencia was interested as well and at a young age, began sleeping with him. In my opinion, she was in a way taken advantage of because of her age. At 18, she could have been easily manipulated into thinking this older man, who was her teacher, could be trusted and that he would take care of her. She â€Å"fell in love† with Drew and had a sexual relationship with him for several years. Until Megan, Drew’s wife, had a baby boy and the story becomes ironic. Clemencia continued to live with Drew and now his son, sporadically, when Megan was not there. She watches the boy grow up, explaining how she took care of him sometimes and how she thought of him, â€Å"These mornings, I fix coffee for me, milk for the boy. I think of that woman, and I can’t see a trace of my lover in this boy, as if she conceived him by immaculate conception† (Cisneros 82). She still had absolutely no respect for Megan, the child’s mother and Drew’s wife, and especially not for herself. Clemencia then explains how she sleeps with the son as well, in order to, â€Å"make the boy love [her] the way [she] love[s] his father† (Cisneros 82). The irony of this situation ties back to how she brings up her mother for being a hussy and a terrible person, but turns out to be one herself and not care for one second how wrong it is. It is also ironic how she was taken advantage of in her past by Drew, and now she took advantage of his son. Research has proved that it is very common for someone who has been abused, to abuse someone else, â€Å"[The abused] have difficulty with intimacy, security, trust, and commitment in [their] relationships. Lacking clearly defined personal limits and boundaries, [they] become enmeshed in [their] needs and emotions† (Characteristics of Emoti onally Abused People). In the beginning of the short story, Clemencia’s mother tells her that she should never marry a mexican because they’ll never be able to give her the type of family support and love that she wants. â€Å"She said this because of my father†(Cisneros 68), says Clemencia. She says this because her father was born in Mexico, which made him different than her and her mother, who were mexican too, but born in America. Her mother made it seem as though it was a bad thing to be full Mexican and meant that you couldn’t be faithful or provide true love and support for a family. In the future, when Clemencia is having an affair with Drew, she ends up viewing herself the same way her mother saw her father; a mexican. She tells herself that she’ll never be good enough for a man who could provide her with everything she wanted. Which she expresses by saying, â€Å"Besides, he could never marry me. You didn’t think†¦? Never marry a Mexican. Never mar ry a Mexican†¦ No, of course not†(Cisneros 80). It’s ironic how she is told from childhood to never marry a Mexican and tells herself that she never will, and in the end, she becomes the â€Å"mexican† that no one should marry. Clemencia’s story of love and life starts off sweet and ends ironically. She carried so much hatred for her mother her whole life for one reason, and ends up doing what the reason was herself. She let someone take advantage of her, but in the future does the same action to an innocent boy. And she even ends up being what she never wanted to be apart of, a â€Å"Mexican†, who couldn’t provide love and support for a real family. She doesn’t think for a second that she’s the bad guy, and wants to blame everyone else in her story. But ironically, she becomes exactly what she hated; a lying, adulterer â€Å"Mexican†. Cisneros, Sandra. Woman Hollering Creek and Other Stories. New York, Vintage, 1991. Peterson, Deb. â€Å"The Secret Power of Your Mind to Determine Your Future.† ThoughtCo, ThoughtCo, 3 July 2019, thoughtco.com/you-are-what-you-think-31688.nbsp; Characteristics of Emotionally Abused People, eqi.org/signs_of_emotionally_abused_people.htm.nbsp;

The Complete IB Biology Syllabus SL and HL

The Complete IB Biology Syllabus SL and HL SAT / ACT Prep Online Guides and Tips Oh, IB Biology. I took IB Biology SL back in my high school days. If you are looking at this syllabus, you're likely interested in taking the course or are currently enrolled in the course. In this article, I will go over the topics covered in IB Biology Standard Level and IB Biology Higher Level, as well as the number of hours dedicated to each topic along with what the IB expects you to understand for each topic. IB Biology SL and HL Core Both IB Biology SL and HL consist of the same core requirements (95 hours). Both classes cover the same six topics in the order listed below with the same subtopics listed below: Topic 1: Cell Biology- 15 Hours for Both SL and HL Subtopic Subtopic Number IB Points to Understand Introduction to cells 1.1 According to the cell theory, living organisms are composed of cells. Organisms consisting of only one cell carry out all functions of life in that cell. Surface area to volume ratio is important in the limitation of cell size. Multicellular organisms have properties that emerge from the interaction of their cellular components. Specialized tissues can develop by cell differentiation in multicellular organisms. Differentiation involves the expression of some genes and not others in a cell’s genome. The capacity of stem cells to divide and differentiate along different pathways is necessary in embryonic development and also makes stem cells suitable for therapeutic uses. Ultrastructure of cells 1.2 Prokaryotes have a simple cell structure without compartmentalization. Eukaryotes have a compartmentalized cell structure. Electron microscopes have a much higher resolution than light microscopes. Membrane structure 1.3 Phospholipids form bilayers in water due to the amphipathic properties of phospholipid molecules. Membrane proteins are diverse in terms of structure, position in the membrane and function. Cholesterol is a component of animal cell membranes. Membrane transport 1.4 Particles move across membranes by simple diffusion, facilitated diffusion, osmosis and active transport. The fluidity of membranes allows materials to be taken into cells by endocytosis or released by exocytosis. Vesicles move materials within cells. The origin of cells 1.5 Cells can only be formed by division of pre-existing cells. The first cells must have arisen from non-living material. The origin of eukaryotic cells can be explained by the endosymbiotic theory. Cell division 1.6 Mitosis is division of the nucleus into two genetically identical daughter nuclei. Chromosomes condense by supercoiling during mitosis. Cytokinesis occurs after mitosis and is different in plant and animal cells. Interphase is a very active phase of the cell cycle with many processes occurring in the nucleus and cytoplasm. Cyclins are involved in the control of the cell cycle. Mutagens, oncogenes and metastasis are involved in the development of primary and secondary tumours. Want to get better grades and test scores? We can help. PrepScholar Tutors is the world's best tutoring service. We combine world-class expert tutors with our proprietary teaching techniques. Our students have gotten A's on thousands of classes, perfect 5's on AP tests, and ludicrously high SAT Subject Test scores. Whether you need help with science, math, English, social science, or more, we've got you covered. Get better grades today with PrepScholar Tutors. Topic 2: Molecular Biology- 21 Hours for Both SL and HL Subtopic Subtopic Number IB Points to Understand Molecules to metabolism 2.1 Molecular biology explains living processes in terms of the chemical substances involved. Carbon atoms can form four covalent bonds allowing a diversity of stable compounds to exist. Life is based on carbon compounds including carbohydrates, lipids, proteins and nucleic acids. Metabolism is the web of all the enzyme-catalysed reactions in a cell or organism. Anabolism is the synthesis of complex molecules from simpler molecules including the formation of macromolecules from monomers by condensation reactions. Catabolism is the breakdown of complex molecules into simpler molecules including the hydrolysis of macromolecules into monomers. Water 2.2 Water molecules are polar and hydrogen bonds form between them. Hydrogen bonding and dipolarity explain the cohesive, adhesive, thermal and solvent properties of water. Substances can be hydrophilic or hydrophobic. Carbohydrates and lipids 2.3 Monosaccharide monomers are linked together by condensation reactions to form disaccharides and polysaccharide polymers. Fatty acids can be saturated, monounsaturated or polyunsaturated. Unsaturated fatty acids can be cis or trans isomers. Triglycerides are formed by condensation from three fatty acids and one glycerol. Proteins 2.4 Amino acids are linked together by condensation to form polypeptides. There are 20 different amino acids in polypeptides synthesized on ribosomes. Amino acids can be linked together in any sequence giving a huge range of possible polypeptides. The amino acid sequence of polypeptides is coded for by genes. A protein may consist of a single polypeptide or more than one polypeptide linked together. The amino acid sequence determines the three-dimensional conformation of a protein. Living organisms synthesize many different proteins with a wide range of functions. Every individual has a unique proteome. Enzymes 2.5 Enzymes have an active site to which specific substrates bind. Enzyme catalysis involves molecular motion and the collision of substrates with the active site. Temperature, pH and substrate concentration affect the rate of activity of enzymes. Enzymes can be denatured. Immobilized enzymes are widely used in industry. Structure of DNA and RNA 2.6 The nucleic acids DNA and RNA are polymers of nucleotides. DNA differs from RNA in the number of strands present, the base composition and the type of pentose. DNA is a double helix made of two antiparallel strands of nucleotides linked by hydrogen bonding between complementary base pairs. DNA replication, transcription and translation 2.7 The replication of DNA is semi-conservative and depends on complementary base pairing. Helicase unwinds the double helix and separates the two strands by breaking hydrogen bonds. DNA polymerase links nucleotides together to form a new strand, using the pre-existing strand as a template. Transcription is the synthesis of mRNA copied from the DNA base sequences by RNA polymerase. Translation is the synthesis of polypeptides on ribosomes. The amino acid sequence of polypeptides is determined by mRNA according to the genetic code. Codons of three bases on mRNA correspond to one amino acid in a polypeptide. Translation depends on complementary base pairing between codons on mRNA and anticodons on tRNA. Cell respiration 2.8 Cell respiration is the controlled release of energy from organic compounds to produce ATP. ATP from cell respiration is immediately available as a source of energy in the cell. Anaerobic cell respiration gives a small yield of ATP from glucose. Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose. Photosynthesis 2.9 Photosynthesis is the production of carbon compounds in cells using light energy. Visible light has a range of wavelengths with violet the shortest wavelength and red the longest. Chlorophyll absorbs red and blue light most effectively and reflects green light more than other colours. Oxygen is produced in photosynthesis from the photolysis of water. Energy is needed to produce carbohydrates and other carbon compounds from carbon dioxide. Temperature, light intensity and carbon dioxide concentration are possible limiting factors on the rate of photosynthesis. Topic 3: Genetics- 15 Hours for Both SL and HL Subtopic Subtopic Number IB Points to Understand Genes 3.1 A gene is a heritable factor that consists of a length of DNA and influences a specific characteristic. A gene occupies a specific position on a chromosome. The various specific forms of a gene are alleles. Alleles differ from each other by one or only a few bases. New alleles are formed by mutation. The genome is the whole of the genetic information of an organism. The entire base sequence of human genes was sequenced in the Human Genome Project. Chromosomes 3.2 Prokaryotes have one chromosome consisting of a circular DNA molecule. Some prokaryotes also have plasmids but eukaryotes do not. Eukaryote chromosomes are linear DNA molecules associated with histone proteins. In a eukaryote species there are different chromosomes that carry different genes. Homologous chromosomes carry the same sequence of genes but not necessarily the same alleles of those genes. Diploid nuclei have pairs of homologous chromosomes. Haploid nuclei have one chromosome of each pair. The number of chromosomes is a characteristic feature of members of a species. A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length. Sex is determined by sex chromosomes and autosomes are chromosomes that do not determine sex. Meiosis 3.3 One diploid nucleus divides by meiosis to produce four haploid nuclei. The halving of the chromosome number allows a sexual life cycle with fusion of gametes. DNA is replicated before meiosis so that all chromosomes consist of two sister chromatids. The early stages of meiosis involve pairing of homologous chromosomes and crossing over followed by condensation. Orientation of pairs of homologous chromosomes prior to separation is random. Separation of pairs of homologous chromosomes in the first division of meiosis halves the chromosome number. Crossing over and random orientation promotes genetic variation. Fusion of gametes from different parents promotes genetic variation. Inheritance 3.4 Mendel discovered the principles of inheritance with experiments in which large numbers of pea plants were crossed. Gametes are haploid so contain only one allele of each gene. The two alleles of each gene separate into different haploid daughter nuclei during meiosis. Fusion of gametes results in diploid zygotes with two alleles of each gene that may be the same allele or different alleles. Dominant alleles mask the effects of recessive alleles but co-dominant alleles have joint effects. Many genetic diseases in humans are due to recessive alleles of autosomal genes, although some genetic diseases are due to dominant or co-dominant alleles. Some genetic diseases are sex-linked. The pattern of inheritance is different with sex-linked genes due to their location on sex chromosomes. Many genetic diseases have been identified in humans but most are very rare. Radiation and mutagenic chemicals increase the mutation rate and can cause genetic diseases and cancer. Genetic modification and biotechnology 3.5 Gel electrophoresis is used to separate proteins or fragments of DNA according to size. PCR can be used to amplify small amounts of DNA. DNA profiling involves comparison of DNA. Genetic modification is carried out by gene transfer between species. Clones are groups of genetically identical organisms, derived from a single original parent cell. Many plant species and some animal species have natural methods of cloning. Animals can be cloned at the embryo stage by breaking up the embryo into more than one group of cells. Methods have been developed for cloning adult animals using differentiated cells. Topic 4: Ecology- 12 Hours for Both SL and HL Subtopic Subtopic Number IB Points to Understand Species, communities and ecosystems 4.1 Species are groups of organisms that can potentially interbreed to produce fertile offspring. Members of a species may be reproductively isolated in separate populations. Species have either an autotrophic or heterotrophic method of nutrition (a few species have both methods). Consumers are heterotrophs that feed on living organisms by ingestion. Detritivores are heterotrophs that obtain organic nutrients from detritus by internal digestion. Saprotrophs are heterotrophs that obtain organic nutrients from dead organisms by external digestion. A community is formed by populations of different species living together and interacting with each other. A community forms an ecosystem by its interactions with the abiotic environment. Autotrophs obtain inorganic nutrients from the abiotic environment. The supply of inorganic nutrients is maintained by nutrient cycling. Ecosystems have the potential to be sustainable over long periods of time. Energy flow 4.2 Most ecosystems rely on a supply of energy from sunlight. Light energy is converted to chemical energy in carbon compounds by photosynthesis. Chemical energy in carbon compounds flows through food chains by means of feeding. Energy released from carbon compounds by respiration is used in living organisms and converted to heat. Living organisms cannot convert heat to other forms of energy. Heat is lost from ecosystems. Energy losses between trophic levels restrict the length of food chains and the biomass of higher trophic levels. Carbon cycling 4.3 Autotrophs convert carbon dioxide into carbohydrates and other carbon compounds. In aquatic ecosystems carbon is present as dissolved carbon dioxide and hydrogen carbonate ions. Carbon dioxide diffuses from the atmosphere or water into autotrophs. Carbon dioxide is produced by respiration and diffuses out of organisms into water or the atmosphere. Methane is produced from organic matter in anaerobic conditions by methanogenic archaeans and some diffuses into the atmosphere or accumulates in the ground. Methane is oxidized to carbon dioxide and water in the atmosphere. Peat forms when organic matter is not fully decomposed because of acidic and/or anaerobic conditions in waterlogged soils. Partially decomposed organic matter from past geological eras was converted either into coal or into oil and gas that accumulate in porous rocks. Carbon dioxide is produced by the combustion of biomass and fossilized organic matter. Animals such as reef-building corals and mollusca have hard parts that are composed of calcium carbonate and can become fossilized in limestone. Climate change 4.4 Carbon dioxide and water vapour are the most significant greenhouse gases. Other gases including methane and nitrogen oxides have less impact. The impact of a gas depends on its ability to absorb long wave radiation as well as on its concentration in the atmosphere. The warmed Earth emits longer wavelength radiation (heat). Longer wave radiation is absorbed by greenhouse gases that retain the heat in the atmosphere. Global temperatures and climate patterns are influenced by concentrations of greenhouse gases. There is a correlation between rising atmospheric concentrations of carbon dioxide since the start of the industrial revolution 200 years ago and average global temperatures. Recent increases in atmospheric carbon dioxide are largely due to increases in the combustion of fossilized organic matter. Topic 5: Evolution and Biodiversity- 12 Hours for Both SL and HL Subtopic Subtopic Number IB Points to Understand Evidence for evolution 5.1 Evolution occurs when heritable characteristics of a species change. The fossil record provides evidence for evolution. Selective breeding of domesticated animals shows that artificial selection can cause evolution. Evolution of homologous structures by adaptive radiation explains similarities in structure when there are differences in function. Populations of a species can gradually diverge into separate species by evolution. Continuous variation across the geographical range of related populations matches the concept of gradual divergence. Natural selection 5.2 Natural selection can only occur if there is variation among members of the same species. Mutation, meiosis and sexual reproduction cause variation between individuals in a species. Adaptations are characteristics that make an individual suited to its environment and way of life. Species tend to produce more offspring than the environment can support. Individuals that are better adapted tend to survive and produce more offspring while the less well adapted tend to die or produce fewer offspring. Individuals that reproduce pass on characteristics to their offspring. Natural selection increases the frequency of characteristics that make individuals better adapted and decreases the frequency of other characteristics leading to changes within the species. Classification of biodiversity 5.3 The binomial system of names for species is universal among biologists and has been agreed and developed at a series of congresses. When species are discovered they are given scientific names using the binomial system. Taxonomists classify species using a hierarchy of taxa. All organisms are classified into three domains. The principal taxa for classifying eukaryotes are kingdom, phylum, class, order, family, genus and species. In a natural classification, the genus and accompanying higher taxa consist of all the species that have evolved from one common ancestral species. Taxonomists sometimes reclassify groups of species when new evidence shows that a previous taxon contains species that have evolved from different ancestral species. Natural classifications help in identification of species and allow the prediction of characteristics shared by species within a group. Cladistics 5.4 A clade is a group of organisms that have evolved from a common ancestor. Evidence for which species are part of a clade can be obtained from the base sequences of a gene or the corresponding amino acid sequence of a protein. Sequence differences accumulate gradually so there is a positive correlation between the number of differences between two species and the time since they diverged from a common ancestor. Traits can be analogous or homologous. Cladograms are tree diagrams that show the most probable sequence of divergence in clades. Evidence from cladistics has shown that classifications of some groups based on structure did not correspond with the evolutionary origins of a group or species. Topic 6: Human Physiology- 20 Hours for Both SL and HL Subtopic Subtopic Number IB Points to Understand Digestion and absorption 6.1 The contraction of circular and longitudinal muscle of the small intestine mixes the food with enzymes and moves it along the gut. The pancreas secretes enzymes into the lumen of the small intestine. Enzymes digest most macromolecules in food into monomers in the small intestine. Villi increase the surface area of epithelium over which absorption is carried out. Villi absorb monomers formed by digestion as well as mineral ions and vitamins. Different methods of membrane transport are required to absorb different nutrients. The blood system 6.2 Arteries convey blood at high pressure from the ventricles to the tissues of the body. Arteries have muscle cells and elastic fibres in their walls. The muscle and elastic fibres assist in maintaining blood pressure between pump cycles. Blood flows through tissues in capillaries. Capillaries have permeable walls that allow exchange of materials between cells in the tissue and the blood in the capillary. Veins collect blood at low pressure from the tissues of the body and return it to the atria of the heart. Valves in veins and the heart ensure circulation of blood by preventing backflow. There is a separate circulation for the lungs. The heart beat is initiated by a group of specialized muscle cells in the right atrium called the sinoatrial node. The sinoatrial node acts as a pacemaker. The sinoatrial node sends out an electrical signal that stimulates contraction as it is propagated through the walls of the atria and then the walls of the ventricles. The heart rate can be increased or decreased by impulses brought to the heart through two nerves from the medulla of the brain. Epinephrine increases the heart rate to prepare for vigorous physical activity. Defense against infectious disease 6.3 The skin and mucous membranes form a primary defense against pathogens that cause infectious disease. Cuts in the skin are sealed by blood clotting. Clotting factors are released from platelets. The cascade results in the rapid conversion of fibrinogen to fibrin by thrombin. Ingestion of pathogens by phagocytic white blood cells gives non-specific immunity to diseases. Production of antibodies by lymphocytes in response to particular pathogens gives specific immunity. Antibiotics block processes that occur in prokaryotic cells but not in eukaryotic cells. Viruses lack a metabolism and cannot therefore be treated with antibiotics. Some strains of bacteria have evolved with genes that confer resistance to antibiotics and some strains of bacteria have multiple resistance. Gas exchange 6.4 Ventilation maintains concentration gradients of oxygen and carbon dioxide between air in alveoli and blood flowing in adjacent capillaries. Type I pneumocytes are extremely thin alveolar cells that are adapted to carry out gas exchange. Type II pneumocytes secrete a solution containing surfactant that creates a moist surface inside the alveoli to prevent the sides of the alveolus adhering to each other by reducing surface tension. Air is carried to the lungs in the trachea and bronchi and then to the alveoli in bronchioles. Muscle contractions cause the pressure changes inside the thorax that force air in and out of the lungs to ventilate them. Different muscles are required for inspiration and expiration because muscles only do work when they contract. Neurons and synapses 6.5 Neurons transmit electrical impulses. The myelination of nerve fibres allows for saltatory conduction. Neurons pump sodium and potassium ions across their membranes to generate a resting potential. An action potential consists of depolarization and repolarization of the neuron. Nerve impulses are action potentials propagated along the axons of neurons. Propagation of nerve impulses is the result of local currents that cause each successive part of the axon to reach the threshold potential. Synapses are junctions between neurons and between neurons and receptor or effector cells. When presynaptic neurons are depolarized they release a neurotransmitter into the synapse. A nerve impulse is only initiated if the threshold potential is reached. Hormones, homeostasis and reproduction 6.6 Insulin and glucagon are secreted by ÃŽ ² and ÃŽ ± cells of the pancreas respectively to control blood glucose concentration. Thyroxin is secreted by the thyroid gland to regulate the metabolic rate and help control body temperature. Leptin is secreted by cells in adipose tissue and acts on the hypothalamus of the brain to inhibit appetite. Melatonin is secreted by the pineal gland to control circadian rhythms. A gene on the Y chromosome causes embryonic gonads to develop as testes and secrete testosterone. Testosterone causes pre-natal development of male genitalia and both sperm production and development of male secondary sexual characteristics during puberty. Estrogen and progesterone cause pre-natal development of female reproductive organs and female secondary sexual characteristics during puberty. The menstrual cycle is controlled by negative and positive feedback mechanisms involving ovarian and pituitary hormones. Additional Higher Level Topics Only students taking IB Biology HL cover these topics. They consist of 60 hours of study. Topic 7: Nucleic Acids- 9 Hours for HL Only Subtopic Subtopic Number IB Points to Understand DNA structure and replication (HL ONLY) 7.1 Nucleosomes help to supercoil the DNA. DNA structure suggested a mechanism for DNA replication. DNA polymerases can only add nucleotides to the 3’ end of a primer. DNA replication is continuous on the leading strand and discontinuous on the lagging strand. DNA replication is carried out by a complex system of enzymes. Some regions of DNA do not code for proteins but have other important functions. Transcription and gene expression (HL ONLY) 7.2 Transcription occurs in a 5’ to 3’ direction. Nucleosomes help to regulate transcription in eukaryotes. Eukaryotic cells modify mRNA after transcription. Splicing of mRNA increases the number of different proteins an organism can produce. Gene expression is regulated by proteins that bind to specific base sequences in DNA. The environment of a cell and of an organism has an impact on gene expression. Translation (HL ONLY) 7.3 Initiation of translation involves assembly of the components that carry out the process. Synthesis of the polypeptide involves a repeated cycle of events. Disassembly of the components follows termination of translation. Free ribosomes synthesize proteins for use primarily within the cell. Bound ribosomes synthesize proteins primarily for secretion or for use in lysosomes. Translation can occur immediately after transcription in prokaryotes due to the absence of a nuclear membrane. The sequence and number of amino acids in the polypeptide is the primary structure. The secondary structure is the formation of alpha helices and beta pleated sheets stabilized by hydrogen bonding. The tertiary structure is the further folding of the polypeptide stabilized by interactions between R groups. The quaternary structure exists in proteins with more than one polypeptide chain. Want to get better grades and test scores? We can help. PrepScholar Tutors is the world's best tutoring service. We combine world-class expert tutors with our proprietary teaching techniques. Our students have gotten A's on thousands of classes, perfect 5's on AP tests, and ludicrously high SAT Subject Test scores. Whether you need help with science, math, English, social science, or more, we've got you covered. Get better grades today with PrepScholar Tutors. Topic 8: Metabolism, Cell Respiration, and Photosynthesis- 14 Hours for HL Only Subtopic Subtopic Number IB Points to Understand Metabolism (HL ONLY) 8.1 Metabolic pathways consist of chains and cycles of enzyme-catalysed reactions. Enzymes lower the activation energy of the chemical reactions that they catalyse. Enzyme inhibitors can be competitive or non-competitive. Metabolic pathways can be controlled by end-product inhibition. Cell respiration (HL ONLY) 8.2 Cell respiration involves the oxidation and reduction of electron carriers. Phosphorylation of molecules makes them less stable. In glycolysis, glucose is converted to pyruvate in the cytoplasm. Glycolysis gives a small net gain of ATP without the use of oxygen. In aerobic cell respiration pyruvate is decarboxylated and oxidized, and converted into acetyl compound and attached to coenzyme A to form acetyl coenzyme A in the link reaction. In the Krebs cycle, the oxidation of acetyl groups is coupled to the reduction of hydrogen carriers, liberating carbon dioxide. Energy released by oxidation reactions is carried to the cristae of the mitochondria by reduced NAD and FAD. Transfer of electrons between carriers in the electron transport chain in the membrane of the cristae is coupled to proton pumping. In chemiosmosis protons diffuse through ATP synthase to generate ATP. Oxygen is needed to bind with the free protons to maintain the hydrogen gradient, resulting in the formation of water. The structure of the mitochondrion is adapted to the function it performs. Photosynthesis (HL ONLY) 8.3 Light-dependent reactions take place in the intermembrane space of the thylakoids. Light-independent reactions take place in the stroma. Reduced NADP and ATP are produced in the light-dependent reactions. Absorption of light by photosystems generates excited electrons. Photolysis of water generates electrons for use in the light-dependent reactions. Transfer of excited electrons occurs between carriers in thylakoid membranes. Excited electrons from Photosystem II are used to contribute to generate a proton gradient. ATP synthase in thylakoids generates ATP using the proton gradient. Excited electrons from Photosystem I are used to reduce NADP. In the light-independent reactions a carboxylase catalyses the carboxylation of ribulose bisphosphate. Glycerate 3-phosphate is reduced to triose phosphate using reduced NADP and ATP. Triose phosphate is used to regenerate RuBP and produce carbohydrates. Ribulose bisphosphate is reformed using ATP. The structure of the chloroplast is adapted to its function in photosynthesis. Topic 9: Plant Biology- 13 Hours for HL Only Subtopic Subtopic Number IB Points to Understand Transport in the xylem of plants (HL ONLY) 9.1 Transpiration is the inevitable consequence of gas exchange in the leaf. Plants transport water from the roots to the leaves to replace losses from transpiration. The cohesive property of water and the structure of the xylem vessels allow transport under tension. The adhesive property of water and evaporation generate tension forces in leaf cell walls. Active uptake of mineral ions in the roots causes absorption of water by osmosis. Transport in the phloem of plants (HL ONLY) 9.2 Plants transport organic compounds from sources to sinks. Incompressibility of water allows transport along hydrostatic pressure gradients. Active transport is used to load organic compounds into phloem sieve tubes at the source. High concentrations of solutes in the phloem at the source lead to water uptake by osmosis. Raised hydrostatic pressure causes the contents of the phloem to flow towards sinks. Growth in plants (HL ONLY) 9.3 Undifferentiated cells in the meristems of plants allow indeterminate growth. Mitosis and cell division in the shoot apex provide cells needed for extension of the stem and development of leaves. Plant hormones control growth in the shoot apex. Plant shoots respond to the environment by tropisms. Auxin efflux pumps can set up concentration gradients of auxin in plant tissue. Auxin influences cell growth rates by changing the pattern of gene expression. Reproduction in plants (HL ONLY) 9.4 Flowering involves a change in gene expression in the shoot apex. The switch to flowering is a response to the length of light and dark periods in many plants. Success in plant reproduction depends on pollination, fertilization and seed dispersal. Most flowering plants use mutualistic relationships with pollinators in sexual reproduction. Topic #10: Genetics and Evolution- 8 Hours for HL Only Subtopic Subtopic Number IB Points to Understand Meiosis (HL ONLY) 10.1 Chromosomes replicate in interphase before meiosis. Crossing over is the exchange of DNA material between non-sister homologous chromatids. Crossing over produces new combinations of alleles on the chromosomes of the haploid cells. Chiasmata formation between non-sister chromatids can result in an exchange of alleles. Homologous chromosomes separate in meiosis I. Sister chromatids separate in meiosis II. Independent assortment of genes is due to the random orientation of pairs of homologous chromosomes in meiosis I. Inheritance (HL ONLY) 10.2 Gene loci are said to be linked if on the same chromosome. Unlinked genes segregate independently as a result of meiosis. Variation can be discrete or continuous. The phenotypes of polygenic characteristics tend to show continuous variation. Chi-squared tests are used to determine whether the difference between an observed and expected frequency distribution is statistically significant. Gene pools and speciation (HL ONLY) 10.3 A gene pool consists of all the genes and their different alleles, present in an interbreeding population. Evolution requires that allele frequencies change with time in populations. Reproductive isolation of populations can be temporal, behavioural or geographic. Speciation due to divergence of isolated populations can be gradual. Speciation can occur abruptly. Topic 11: Animal Physiology- 16 Hours for HL Only Subtopic Subtopic Number IB Points to Understand Antibody production and vaccination (HL ONLY) 11.1 Every organism has unique molecules on the surface of its cells. Pathogens can be species-specific although others can cross species barriers. B lymphocytes are activated by T lymphocytes in mammals. Activated B cells multiply to form clones of plasma cells and memory cells. Plasma cells secrete antibodies. Antibodies aid the destruction of pathogens. White cells release histamine in response to allergens. Histamines cause allergic symptoms. Immunity depends upon the persistence of memory cells. Vaccines contain antigens that trigger immunity but do not cause the disease. Fusion of a tumour cell with an antibody-producing plasma cell creates a hybridoma cell. Monoclonal antibodies are produced by hybridoma cells. Movement (HL ONLY) 11.2 Bones and exoskeletons provide anchorage for muscles and act as levers. Synovial joints allow certain movements but not others. Movement of the body requires muscles to work in antagonistic pairs. Skeletal muscle fibres are multinucleate and contain specialized endoplasmic reticulum. Muscle fibres contain many myofibrils. Each myofibril is made up of contractile sarcomeres. The contraction of the skeletal muscle is achieved by the sliding of actin and myosin filaments. ATP hydrolysis and cross bridge formation are necessary for the filaments to slide. Calcium ions and the proteins tropomyosin and troponin control muscle contractions. The kidney and osmoregulation (HL ONLY) 11.3 Animals are either osmoregulators or osmoconformers. The Malpighian tubule system in insects and the kidney carry out osmoregulation and removal of nitrogenous wastes. The composition of blood in the renal artery is different from that in the renal vein. The ultrastructure of the glomerulus and Bowman’s capsule facilitate ultrafiltration. The proximal convoluted tubule selectively reabsorbs useful substances by active transport. The loop of Henle maintains hypertonic conditions in the medulla. ADH controls reabsorption of water in the collecting duct. The length of the loop of Henle is positively correlated with the need for water conservation in animals. The type of nitrogenous waste in animals is correlated with evolutionary history and habitat. Sexual reproduction (HL ONLY) 11.4 Spermatogenesis and oogenesis both involve mitosis, cell growth, two divisions of meiosis and differentiation. Processes in spermatogenesis and oogenesis result in different numbers of gametes with different amounts of cytoplasm. Fertilization in animals can be internal or external. Fertilization involves mechanisms that prevent polyspermy. Implantation of the blastocyst in the endometrium is essential for the continuation of pregnancy. HCG stimulates the ovary to secrete progesterone during early pregnancy. The placenta facilitates the exchange of materials between the mother and fetus. Estrogen and progesterone are secreted by the placenta once it has formed. Birth is mediated by positive feedback involving estrogen and oxytocin. Options As a part of the IB Biology class, you'll cover one additional subject from the options below. (Typically you don’t choose, but rather your teacher does.) Whichever option you or your teacher chooses, you'll cover three or four topics (15 hours total) for SL and an additional two or three topics (25 hours total) for HL. Option A: Neurobiology and Behaviour- 15 Hours for SL and 25 hours for HL Subtopic Subtopic Number IB Points to Understand Neural development A.1 The neural tube of embryonic chordates is formed by infolding of ectoderm followed by elongation of the tube. Neurons are initially produced by differentiation in the neural tube. Immature neurons migrate to a final location. An axon grows from each immature neuron in response to chemical stimuli. Some axons extend beyond the neural tube to reach other parts of the body. A developing neuron forms multiple synapses. Synapses that are not used do not persist. Neural pruning involves the loss of unused neurons. The plasticity of the nervous system allows it to change with experience. The human brain A.2 The anterior part of the neural tube expands to form the brain. Different parts of the brain have specific roles. The autonomic nervous system controls involuntary processes in the body using centres located mainly in the brain stem. The cerebral cortex forms a larger proportion of the brain and is more highly developed in humans than other animals. The human cerebral cortex has become enlarged principally by an increase in total area with extensive folding to accommodate it within the cranium. The cerebral hemispheres are responsible for higher order functions. The left cerebral hemisphere receives sensory input from sensory receptors in the right side of the body and the right side of the visual field in both eyes and vice versa for the right hemisphere. The left cerebral hemisphere controls muscle contraction in the right side of the body and vice versa for the right hemisphere. Brain metabolism requires large energy inputs. Perception of stimuli A.3 Receptors detect changes in the environment. Rods and cones are photoreceptors located in the retina. Rods and cones differ in their sensitivities to light intensities and wavelengths. Bipolar cells send the impulses from rods and cones to ganglion cells. Ganglion cells send messages to the brain via the optic nerve. The information from the right field of vision from both eyes is sent to the left part of the visual cortex and vice versa. Structures in the middle ear transmit and amplify sound. Sensory hairs of the cochlea detect sounds of specific wavelengths. Impulses caused by sound perception are transmitted to the brain via the auditory nerve. Hair cells in the semicircular canals detect movement of the head. Additional HL Neurobiology and Behaviour Topics- 10 More Hours for HL Innate and learned behaviour (HL ONLY) A.4 Innate behaviour is inherited from parents and so develops independently of the environment. Autonomic and involuntary responses are referred to as reflexes. Reflex arcs comprise the neurons that mediate reflexes. Reflex conditioning involves forming new associations. Learned behaviour develops as a result of experience. Imprinting is learning occurring at a particular life stage and is independent of the consequences of behaviour. Operant conditioning is a form of learning that consists of trial and error experiences. Learning is the acquisition of skill or knowledge. Memory is the process of encoding, storing and accessing information. Neuropharmacology (HL ONLY) A.5 Some neurotransmitters excite nerve impulses in postsynaptic neurons and others inhibit them. Nerve impulses are initiated or inhibited in post-synaptic neurons as a result of summation of all excitatory and inhibitory neurotransmitters received from presynaptic neurones. Many different slow-acting neurotransmitters modulate fast synaptic transmission in the brain. Memory and learning involve changes in neurones caused by slow-acting neurotransmitters. Psychoactive drugs affect the brain by either increasing or decreasing postsynaptic transmission. Anesthetics act by interfering with neural transmission between areas of sensory perception and the CNS. Stimulant drugs mimic the stimulation provided by the sympathetic nervous system. Addiction can be affected by genetic predisposition, social environment and dopamine secretion. Ethology (HL ONLY) A.6 Ethology is the study of animal behaviour in natural conditions. Natural selection can change the frequency of observed animal behaviour. Behaviour that increases the chances of survival and reproduction will become more prevalent in a population. Learned behaviour can spread through a population or be lost from it more rapidly than innate behaviour. Option B: Biotechnology and Bioinformatics- 15 Hours for SL and HL Subtopic Subtopic Number IB Points to Understand Microbiology: organisms in industry B.1 Microorganisms are metabolically diverse. Microorganisms are used in industry because they are small and have a fast growth rate. Pathway engineering optimizes genetic and regulatory processes within microorganisms. Pathway engineering is used industrially to produce metabolites of interest. Fermenters allow large-scale production of metabolites by microorganisms. Fermentation is carried out by batch or continuous culture. Microorganisms in fermenters become limited by their own waste products. Probes are used to monitor conditions within fermenters. Conditions are maintained at optimal levels for the growth of the microorganisms being cultured. Biotechnology in agriculture B.2 Transgenic organisms produce proteins that were not previously part of their species’ proteome. Genetic modification can be used to overcome environmental resistance to increase crop yields. Genetically modified crop plants can be used to produce novel products. Bioinformatics plays a role in identifying target genes. The target gene is linked to other sequences that control its expression. An open reading frame is a significant length of DNA from a start codon to a stop codon. Marker genes are used to indicate successful uptake. Recombinant DNA must be inserted into the plant cell and taken up by its chromosome or chloroplast DNA. Recombinant DNA can be introduced into whole plants, leaf discs or protoplasts. Recombinant DNA can be introduced by direct physical and chemical methods or indirectly by vectors. Environmental protection B.3 Responses to pollution incidents can involve bioremediation combined with physical and chemical procedures. Microorganisms are used in bioremediation. Some pollutants are metabolized by microorganisms. Cooperative aggregates of microorganisms can form biofilms. Biofilms possess emergent properties. Microorganisms growing in a biofilm are highly resistant to antimicrobial agents. Microorganisms in biofilms cooperate through quorum sensing. Bacteriophages are used in the disinfection of water systems. Additional HL Biotechnology and Bioinfomatics Topics- 10 More Hours for HL Medicine (HL ONLY) B.4 Infection by a pathogen can be detected by the presence of its genetic material or by its antigens. Predisposition to a genetic disease can be detected through the presence of markers. DNA microarrays can be used to test for genetic predisposition or to diagnose the disease. Metabolites that indicate disease can be detected in blood and urine. Tracking experiments are used to gain information about the localization and interaction of a desired protein. Biopharming uses genetically modified animals and plants to produce proteins for therapeutic use. Viral vectors can be used in gene therapy. Bioinformatics (HL ONLY) B.5 Databases allow scientists easy access to information. The body of data stored in databases is increasing exponentially. BLAST searches can identify similar sequences in different organisms. Gene function can be studied using model organisms with similar sequences. Sequence alignment software allows comparison of sequences from different organisms. BLASTn allows nucleotide sequence alignment while BLASTp allows protein alignment. Databases can be searched to compare newly identified sequences with sequences of known function in other organisms. Multiple sequence alignment is used in the study of phylogenetics. EST is an expressed sequence tag that can be used to identify potential genes. Option C: Ecology and Conservation- 15 Hours for SL and HL Subtopic Subtopic Number IB Points to Understand Species and communities C.1 The distribution of species is affected by limiting factors. Community structure can be strongly affected by keystone species. Each species plays a unique role within a community because of the unique combination of its spatial habitat and interactions with other species. Interactions between species in a community can be classified according to their effect. Two species cannot survive indefinitely in the same habitat if their niches are identical. Communities and ecosystems C.2 Most species occupy different trophic levels in multiple food chains. A food web shows all the possible food chains in a community. The percentage of ingested energy converted to biomass is dependent on the respiration rate. The type of stable ecosystem that will emerge in an area is predictable based on climate. In closed ecosystems energy but not matter is exchanged with the surroundings. Disturbance influences the structure and rate of change within ecosystems. Impacts of humans on ecosystems C.3 Introduced alien species can escape into local ecosystems and become invasive. Competitive exclusion and the absence of predators can lead to reduction in the numbers of endemic species when alien species become invasive. Pollutants become concentrated in the tissues of organisms at higher trophic levels by biomagnification. Macroplastic and microplastic debris has accumulated in marine environments. Conservation of biodiversity C.4 An indicator species is an organism used to assess a specific environmental condition. Relative numbers of indicator species can be used to calculate the value of a biotic index. In situ conservation may require active management of nature reserves or national parks. Ex situ conservation is the preservation of species outside their natural habitats. Biogeographic factors affect species diversity. Richness and evenness are components of biodiversity. Additional HL Ecology and Conservation Topics- 10 More Hours for HL Population ecology (HL ONLY) C.5 Sampling techniques are used to estimate population size. The exponential growth pattern occurs in an ideal, unlimited environment. Population growth slows as a population reaches the carrying capacity of the environment. The phases shown in the sigmoid curve can be explained by relative rates of natality, mortality, immigration and emigration. Limiting factors can be top down or bottom up. Nitrogen and phosphorus cycles (HL ONLY) C.6 Nitrogen-fixing bacteria convert atmospheric nitrogen to ammonia. Rhizobium associates with roots in a mutualistic relationship. In the absence of oxygen denitrifying bacteria reduce nitrate in the soil. Phosphorus can be added to the phosphorus cycle by application of fertilizer or removed by the harvesting of agricultural crops. The rate of turnover in the phosphorus cycle is much lower than the nitrogen cycle. Availability of phosphate may become limiting to agriculture in the future. Leaching of mineral nutrients from agricultural land into rivers causes eutrophication and leads to increased biochemical oxygen demand. Option D: Human Physiology- 15 Hours for SL and HL Subtopic Subtopic Number IB Points to Understand Human nutrition D.1 Essential nutrients cannot be synthesized by the body, therefore they have to be included in the diet. Dietary minerals are essential chemical elements. Vitamins are chemically diverse carbon compounds that cannot be synthesized by the body. Some fatty acids and some amino acids are essential. Lack of essential amino acids affects the production of proteins. Malnutrition may be caused by a deficiency, imbalance or excess of nutrients in the diet. Appetite is controlled by a centre in the hypothalamus. Overweight individuals are more likely to suffer hypertension and type II diabetes. Starvation can lead to breakdown of body tissue. Digestion D.2 Nervous and hormonal mechanisms control the secretion of digestive juices. Exocrine glands secrete to the surface of the body or the lumen of the gut. The volume and content of gastric secretions are controlled by nervous and hormonal mechanisms. Acid conditions in the stomach favour some hydrolysis reactions and help to control pathogens in ingested food. The structure of cells of the epithelium of the villi is adapted to the absorption of food. The rate of transit of materials through the large intestine is positively correlated with their fibre content. Materials not absorbed are egested. Functions of the liver D.3 The liver removes toxins from the blood and detoxifies them. Components of red blood cells are recycled by the liver. The breakdown of erythrocytes starts with phagocytosis of red blood cells by Kupffer cells. Iron is carried to the bone marrow to produce hemoglobin in new red blood cells. Surplus cholesterol is converted to bile salts. Endoplasmic reticulum and Golgi apparatus in hepatocytes produce plasma proteins. The liver intercepts blood from the gut to regulate nutrient levels. Some nutrients in excess can be stored in the liver. The heart D.4 Structure of cardiac muscle cells allows propagation of stimuli through the heart wall. Signals from the sinoatrial node that cause contraction cannot pass directly from atria to ventricles. There is a delay between the arrival and passing on of a stimulus at the atrioventricular node. This delay allows time for atrial systole before the atrioventricular valves close. Conducting fibres ensure coordinated contraction of the entire ventricle wall. Normal heart sounds are caused by the atrioventricular valves and semilunar valves closing causing changes in blood flow. Additional HL Human Physiology Topics- 10 More Hours for HL Hormones and metabolism (HL ONLY) D.5 Endocrine glands secrete hormones directly into the bloodstream. Steroid hormones bind to receptor proteins in the cytoplasm of the target cell to form a receptor–hormone complex. The receptor–hormone complex promotes the transcription of specific genes. Peptide hormones bind to receptors in the plasma membrane of the target cell. Binding of hormones to membrane receptors activates a cascade mediated by a second messenger inside the cell. The hypothalamus controls hormone secretion by the anterior and posterior lobes of the pituitary gland. Hormones secreted by the pituitary control growth, developmental changes, reproduction and homeostasis. Transport of respiratory gases (HL ONLY) D.6 Oxygen dissociation curves show the affinity of hemoglobin for oxygen. Carbon dioxide is carried in solution and bound to hemoglobin in the blood. Carbon dioxide is transformed in red blood cells into hydrogencarbonate ions. The Bohr shift explains the increased release of oxygen by hemoglobin in respiring tissues. Chemoreceptors are sensitive to changes in blood pH. The rate of ventilation is controlled by the respiratory control centre in the medulla oblongata. During exercise the rate of ventilation changes in response to the amount of CO2 in the blood. Fetal hemoglobin is different from adult hemoglobin allowing the transfer of oxygen in the placenta onto the fetal hemoglobin. Practical Scheme of Work You also need to complete experiments and experimental reports as a part of any IB Science course. For SL, there is 40 hours of material. For HL, there is 60 hours of material. Here are the activities: Practical activities: 20 hours for SL and 40 hours for HL Lab work in class counts towards these hours Individual investigation (internal assessment-IA): 10 hours for SL and HL A lab project along with a report that counts as 20% of your IB exam scores (written exam counts for the other 80%) Group 4 Project:10 hours for SL and HL Students are separated into groups and must conduct an experiment and write a report. Experiments may not be this cool. What’s Next? Thinking about taking AP Biology instead? Learn what's covered in a AP Bio here. Looking for more in-depth explorations of the topics mentioned on this syllabus? Read our subject-specific articles on topics varying from the photosynthesis equation to homologous and analogous structures to cell biology (including cell theory, enzymes, and how the cell membrane and endoplasmic reticulum work). Are you hoping to squeeze in some extra IB classes? Learn about the IB courses offered online. Studying for the SAT? Check out our complete guide to the SAT. Taking the SAT in the next month? Check out our guide to cramming. Not sure where you want to go to college? Check out our guide to finding your target school. Want to improve your SAT score by 160 points or your ACT score by 4 points? We've written a guide for each test about the top 5 strategies you must be using to have a shot at improving your score. Download it for free now: