Cell Transport Mechanisms and Permeability

Exercise 1: Cell TransportMechanisms and Permeability:Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Pre-lab Quiz Results You scored 75% by answering 3 out of 4 questions correctly. 1. The driving force for diffusion is Your answer : c. the membrane transport protein. Correct answer: b. the kinetic energy of the molecules in motion. 2. In diffusion, molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the largest pore size? You correctly answered: d. 200 MWCO 4. Avogadro's number is a constant for the number of You correctly answered: b. molecules. Experiment Results Predict Question: Predict Question 1: The molecular weight of urea is 60. 7. Do you think urea will diffuse through the 20 MWCO membrane? Your answer : a. Yes, but very slowly. Predict Question 2: Recall that glucose is a monosaccharide, albumin is a protein with 607 amino acids, and the average molecular weight of a single amino acid is 135 g/mole. Which of the following will be able to diffuse through the 200 MWCO membrane? Your answer : b. oth glucose and albuminStop & ThinkQuestions: The reason sodium chloride didn't diffuse left to right is that You correctly answered: c. the membrane pore size was too small. Glucose is a six-carbon sugar. Albumin is a protein with 607 amino acids. The average molecular weight of a single amino acid is 135 g/mole. There is no reason to run these solutes at the 20 MWCO because Your answer : b. glucose is a protein and therefore too large to pass. Correct answer: d. glucose and albumin are both too large to pass. The rate of diffusion for urea Your answer : c. s faster than that for sodium because urea is a smaller molecule. Correct answer: b. is slower than that for sodium because urea is a larger molecule.Post-lab Quiz ResultsYou have not completed the Post-lab Quiz. Review Sheet ResultsDescribe two variables that affect the rate of diffusion. Your answer: the solute and the MWCOWhy do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? Your answer: I was wrong. The urea was too large to diffuse through the 20 MWCODescribe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your prediction? Your answer: I was wrong here as well. Only the glucose was able to diffuse.Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. Your answer: sodium chloride, urea, glucose and albumin.

Defining Prejudice Essay

Prejudice-a preconceived negative judgement of a group and its individual members. -prejudice is an attitude. The negative evaluations that mark prejudice often are supported by negative beliefs called stereotypes. Forms of prejudice Stereotype – a belief about the personal attributes of a group of people. Stereotypes are sometimes overgeneralized, inaccurate, and resistant to new information. Discrimination- unjustified negative behaviour toward a group or its members. Racism- an individual’s prejudicial attitudes and discriminatory behaviour toward people of a given race or institutional practices that subordinate people of a given race. Sexism- an individual’s prejudicial attitudes and discriminatory behaviour toward people of a given sex. Racial prejudice In the context of the world, Every race is a minority. Most folks see prejudice in other people. -is racial prejudice disappearing? -in 1942 most Americans agreed that there should be separate sections for negroes on streetcars and buses. -parents both black and white suggested that their children should know the history of blacks and whites. -most black and white would likely to vote a black American for president. In the United States, whites tend to compare the present with the oppressive past and to perceive swift and radical progress. Blacks tend to compare their present with their ideal world, which has not yet been realized, and to perceive somewhat less progress. Gender Prejudice – people’s prejudgment on others based on gender. Gender Stereotype – are simplistic generalizations about the gender attributes, differences, and roles of individuals and/or groups. Stereotypes can be positive or negative, but they rarely communicate accurate information about others. When people automatically apply gender assumptions to others regardless of evidence to the contrary, they are perpetuating gender stereotyping. Many people recognize the dangers of gender stereotyping, yet continue to make these types of generalizations. the female stereotypic  role is to marry and have children. She is also to put her family’s welfare before her own; be loving, compassionate, caring, nurturing, and sympathetic; and find time to be sexy and feel beautiful. The male stereotypic role is to be the financial provider. He is also to be assertive, competitive, independent, courageous, and career†focused; hold his emotions in check; and always initiate sex. These sorts of stereotypes can prove harmful; they can stifle individual expression and creativity, as well as hinder personal and professional growth. Ambivalent Sexism – Ambivalent sexism is an ideology composed of both a â€Å"hostile† and â€Å"benevolent† prejudice toward women. Hostile sexism is an antagonistic attitude toward women, who are often viewed as trying to control men through feminist ideology or sexual seduction. Benevolent sexism is a chivalrous attitude toward women that feels favorable but is actually sexist because it casts women as weak creatures in need of men’s protection. What causes ambivalent sexism? According to Professors Glick and Fiske, sexist ambivalence is the result of two basic facts about relations between women and men: male dominance (patriarchy) and interdependence between the sexes. Male dominance is prevalent across cultures, with men dominating high status roles in business, government, religious institutions, and so forth. Hostile sexism arises in large part because dominant groups tend to create hostile ideologies concerning the inferiority of other groups. Despite male dominance, however, men are often highly dependent upon women as wives, mothers, and romantic partners. This dependence fosters benevolent sexism, which recognizes women as valuable and attractive (an attitude not generally present in prejudices such as racism, anti-Semitism, and homophobia, in which the targets of prejudice are typically shunned or loathed). Gender Discrimination – Discrimination based on gender or sex Where and When Can Gender Discrimination Occur? Employment – Including claims that a potential employer asked discriminatory questions based on gender during the interview process; claims that an employer failed to hire, failed to promote, or wrongfully terminated an  employee based on his or her gender; unequal pay claims; and claims for sexual harassment of employees. Education – Including claims for exclusion from educational programs or opportunities based on gender; and claims for sexual harassment of students. Housing – Including claims for refusal to negotiate with a person seeking housing, claims for imposition of different lease/contract terms, and claims for refusal to extend a loan based on the gender of the applicant/tenant/buyer. Borrowing / Credit – Including claims for refusal to extend credit, claims for imposition of unequal loan terms, and claims arising from improper inquiries during the credit/loan approval process, based on the gender of the applicant. 3 SOURCES OF PREJUDICE Social Source Emotional Source Cognitive Source Social Sources of Prejudice The self-fulfilling prophecy: where a belief is accepted as truth, & in stating it, becomes true. Stereotype Threat Stereotype threat is â€Å"the threat of being viewed through the lens of a negative stereotype, or the fear of doing something that would inadvertently confirm that stereotype,† such as the stereotype that women perform poorly in math. Some students try to escape stereotype threat by misidentifying with the part of life in which the stereotype originates, such as race or ethnic identities. Emotional Sources of Prejudice Frustration & aggression: The Scapegoat Theory: When problems occur, people do not like to blame themselves. They will thus actively seek scapegoats onto whom they can displace their aggression. Scapegoats may be out-group individuals or even entire groups. Powerless people who cannot easily resist will often become victims of scapegoating. Scapegoating increases when people are frustrated &  seeking an outlet for their anger. The Realistic Group Conflict Theory When there are limited resources, then this leads to conflict, prejudice & discrimination between groups who seek that common resource. Cross-race/ Other-race Effect Refers to the tendency to more easily recognize members of one’s own race. A study was made which examined 271 real court cases. The results from this study showed that witnesses correctly identified 65 % of the defendants which were of the same race as them. On the other hand, 45% of the defendants were identified which belonged to a different race than the witnesses. Just-world Phenomenon The just-world phenomenon, refers to the tendency for people to believe that the world is â€Å"just† & so therefore people get what they deserve.† It wrongly colors our impression of â€Å"victims† of any sort. Controversies and Prominent Topics Sexism Nationalism Classism Sexual Discrimination Racism Religious Discrimination Linguistic Discrimination Reducing Prejudice The contact hypothesis The contact hypothesis predicts that prejudice can only be reduced when in-group and out-group members are brought together. In particular, there are six conditions that must be met to reduce prejudice, as were cultivated in Elliot Aronson’s Jigsaw Classroom. First, the in- and out- groups must have a degree of mutual interdependence. Second, both groups need to share a common goal. Third, the two groups must have equal status. Fourth, there  must be frequent opportunities for informal and interpersonal contact between groups. Fifth, there should be multiple contacts between the in- and the out- groups. Finally, social norms of equality must exist and be present to foster prejudice reduction.

Caribbean history Essay Example | Topics and Well Written Essays - 750 words

Caribbean history - Essay Example Tiones and Arawaks lived a peaceful life with happiness before arrival of Columbus. Agriculture, fishing and hunting were their daily activities for fulfilling basic needs. Arawaks had copper colour with long black hairs (Johnson 1920). Arawaks had a unique lifestyle and a very gentle society. They lived as a society and society was just like a small kingdom. Their leaders were called cacique. Every Arawak and Tiones had 2 or 3 wives as per the culture. The cacique always had more wives than normal people as it was a symbol of pride for the woman to marry a cacique. Marring a cacique used to raise the authority and lifestyle of the woman. Children of the cacique were provided with better lifestyle and future opportunities (Williams 1984). House construction of the Arawaks and Tiones was basically of round shape that a supported with a pole in the centre. Palm leaves were used to cover the house from the top. Caciques had rectangular shaped houses as to create difference between a cacique and a normal man. Mats of banana leaves were the material used for sleeping in absence of any other bedding (Williams 1984). ZEMI were the gods of Arawaks and they used to arrange different religious functions. Religious practice included dancing, religious worship and medical treatment by ZEMI. People also consulted ZEMI for advice on health matters. Agricultural festivals also had certain religious features as thank giving. Specific dress was used on such festivals and drum beating with cacique sitting at a special place. Singing and admiring of cacique are the main events of such festivals (Williams 1984). Different caciques asked for certain help when Columbus landed in the region. Cacique Guacanagarie of Marien (Bainoa) asked Columbus to save him from Caribs. He became the very good friend of Columbus. Canoba was the leader who resisted Spanish movement in the area. Columbus offered Canoba a chain of gold. Conaba mistakenly took

The Gulf Cooperation Council Assignment Example | Topics and Well Written Essays - 1000 words

The Gulf Cooperation Council - Assignment Example However, other studies have found a stronger relationship between oil prices and stock market performance in GCC. Therefore, evidence shows a strong long-run relationship in Bahrain between oil price fluctuation and stock market performance that took the cue from oil prices. Other evidence also justifies that shocks attributable to volatility attract many concerns in GCC than shocks attached to oil price returns. In the subsequent discussion of this article, I, therefore, expand on the short and long-term relationship between stock market performance and oil price movement in the GCC countries. Â  The analysis of the relationships between stock market performance and oil price fluctuations is executed both at country and industry levels. The evidence shows that at the country level, with the exception of Kuwait, stock markets have great positive exposures to oil prices shocks. However, at the industry level, the reactions of industry-specific returns to oil price movements are greatly positive for 12 of the 20 countries studied. Therefore, oil price alterations indicate the asymmetric impact on stock market returns in the country alongside the industry level. Â  

Homeland Security - Capstone Essay Example | Topics and Well Written Essays - 1750 words

Homeland Security - Capstone - Essay Example Ten years later, we are still looking for answers although much speculation and some verified facts have come out for public viewing since then. There are things we know for sure now – and then things we can only wonder about because there is no one available to answer the questions that only the dead know. But we have been able to piece some pieces of information together, only to come up with more questions, some of which we really dont want to ask because the answer could mean we were betrayed by our own government who did not heed the warning signals. For instance, Phillipine intelligence had indicated to the United States that there was an attack being planned to hit the Twin Towers and other well-known sites. The plot, Project Bojinka, was known about as early as 1995. â€Å"Project Bojinka was known by the CIA, and the FBI. It was described in court documents in the trial in New York of Ramzi Yousef, and Abdul Murad for their participation in the bombing of the World Trade Center in 1993† (Ahmed, 2002). Additionally, FBI agents were aware of suspicious Arab-Americans learning how to fly planes in certain parts of the country. Special Agent Robert G. Wright Jr. said the Offices of the Directors of the FBI threated Wright with criminal prosecution if he said anything to the media about the prior knowledge the FBI had of the attacks against the United States, (Vernon, 2002). Special Agent Wright was demoted to doing paperwork at a desk in the office, and was scheduled to testify against the FBI for not saving thousands of innocent people of September 11, 2001, (Vernon, 2002). The purpose of this study has been to determine if there were any precautions we could have taken ahead of the event that would have prevented such an occurrence. We then look at what we have done since the attack to prevent further occurrences of terrorism

EUROPEAN UNION EQUALITY POLICIES AND WORKPLACE LEGISLATION Essay

EUROPEAN UNION EQUALITY POLICIES AND WORKPLACE LEGISLATION - Essay Example The legislation also advocate for the provisions that ensure that the disabled people in the society are able to work comfortably. This essay shall discuss the equality policies and workplace legislations that cover gender, age, religion and belief, race, and ethnicity. The European Union has formulated policies that advocate for gender equality in many angles. They ensure and promote the existence of equity between men and women, the promote application of gender mainstreaming and facilitate exploration of transgender issues. The policies ensure that the European Union observes gender equality in all the activities at the workplace. The legislations through the Treaty of Rome came up with a principle that ensure that each member state shall give equal pay for men women for equal work (Allen QC & Crasnow, 2001). This principle advocates for equality between men and women and concentrates in the equality at the workplace than in the society. Among all the inequalities in the workplace, the European Union takes more focus to address the issue of gender inequality. The European Union has so far launched a committee that advocates for women rights in its member states. It then established a commission on equal opportunities for all gender to support th e activities carried out by the advisory that handles issues on the availability of equal opportunities between men and women. To sum all these efforts up the European Union has a Commissioner that issues an annual report on gender equality (Carver & Mottier, 1998). The European union refers to equality between men and women when dealing with issues of gender equality rather than women rights since the latter appears as one sided which shows one kind of gender is given dominance. Apart from the provision of equal pay for equal work of an equal value for all gender the European Union has a directive that ensures equal treatment for all gender in matters concerning access to training and employment. This clause also

The Opponents of the Euthanasia and a Major Essentials of Human Life Research Paper

The Opponents of the Euthanasia and a Major Essentials of Human Life - Research Paper Example Euthanasia stands justified on several grounds of morality. The arguments favouring the voluntary euthanasia or assisted suicide is justifiable on the ethical grounds of individual sovereignty and the professed responsibility of the health professionals for respecting the patient’s informed preferences. It is justified on the ground of individual autonomy, when one chooses to live the life he or she wants to, the individual should have the authority and the individuality for choosing the kind of death he or she wants to witness. The right to choose his or her death should be respected. The advocates of voluntary euthanasia argue that an adult has every right to refuse any kind of treatment which might involve a life saving one. The concepts of ethical issues have been considered to support voluntary euthanasia. It is being argued that if an individual has the authority to make informed choices about medical treatment then the right of informed medical assistance to death gets naturally extended to her. (Sanders and Chaloner, 2007, pp. 41-42) Individual autonomy also necessarily stands against slavery, while it can be argued that slavery is not justifiable. The reason for not allowing slavery in a free country is the fact that handing over the control of one’s own life is the most unwise things to do, hence man takes all the decision in his life by his own. Similarly while deciding on whether to die or not the man himself has every right and authority to take the decision. To save her husband from the legal consequences she appealed to the court to grant her petition of euthanasia.