Biology Lab on Osmosis - 1881 Words

Michelle Kim 2012.1.20 Biology Iso-osmolar Concentration of Carrot Cells Lab INTRODUCTION For a more thorough understanding of this lab introduction, the concepts of, iso osmolar, membrane, equilibrium, and concentration gradient evaluated. Iso osmolar can be known as the point in which the substance of experimentation faces no change despite the amount of solute inside the solvent( because the solvent and solute concentration is equal. This is where the line on a graph would cross on the x-axis). Selectively permeable membrane can be defined as a microscopic double layer of lipids and proteins that bounds cells and organelles and forms structures within cells and it controls what comes in and out of the cell. Equilibrium is the†¦show more content†¦The result showed the affects of osmosis, where particles moved to achieve equilibrium. The 0.2 M sucrose had a +8.37% change in mass as a class average and our group and +9.52%. The initial mass for these carrots were 2.1g and became 2.3g when the 2 days had ended. This happened because of the same reason for the 0.0 M sucrose, where the concentration of particles were greater inside the cell compared to the outside of the cell, causing the water molecules moving into the cell through the semi permeable membrane. However, the solution the carrots were dunked into had a 0.2 M sucrose, unlike the first solution. This caused the mass of the carrot to change less because there was already some particles outside of the cell, allowing for equilibrium to become reached a lot faster than 0.0 M sucrose. In 0.4 M sucrose, there was a class average of -2.34% and we had -4.76%. The initial mass was 2.1g with a final mass of 2.0g. This was the first solution to have a negative percentage change in mass from the other six. There was a decrease in mass of the carrot because water had moved from the carrot sticks into the solution around is trying to achieve equilibrium. The water molecules had moved from high concentration into lower concentration, moving our of the carrot cells, causing them toShow MoreRelat edBiology Osmosis Lab Report Essay1890 Words   |  8 PagesOsmosis Lab Report by Evan Gerber Claire Cambron First Lab Report Wednesday 10:30am February 20, 2013 Theresa Gburek Abstract The major objective of the experiment was to test the effect of the concentration gradient on the diffusion rate. It was hypothesized that the greater the stronger the concentration gradient, the faster the rate of diffusion would be. To test this, dialysis tubes were submerged in different concentration fructose solutions. We weighed the tubes at specificRead MoreAp Biology Egg Osmosis Lab Essay658 Words   |  3 PagesAP Biology August 23, 2012 Egg Osmosis Lab Definition of osmosis: The diffusion of water across a selectively permeable membrane from high to low concentrations Hypothesis: If I place an egg in vinegar, then the outer layer of the egg is going to become slimy and look like rubber. It will also become larger and bubbles will form on and around the egg. Hypothesis: If I place an egg in corn syrup, then the egg will become small and the outer layer will not look like rubber any longer. Day one: Read MoreBiology Lab Report Ib Hl Osmosis1928 Words   |  8 PagesBiology Lab Report 2 Investigating the phenomenon of Osmosis in plant tissues: Potato in different concentrations of NaCl Tutor: Maria Tsaousidou By Marina Gkritzioudi Biology Lab Report 2 Investigating the phenomenon of Osmosis in plant tissues: Potato in different concentrations of NaCl Tutor: Maria Tsaousidou By Marina Gkritzioudi Investigating the phenomenon of Osmosis in plant tissues: Potato in different concentrations of NaCl Introduction: Osmosis is the movement ofRead MoreOsmosis Potato Lab Report Biology 4u Essay2115 Words   |  9 PagesIntroduction The movement of water molecules across a semi-permeable membrane is the process of osmosis. If there is a solute and a solvent, each containing different concentration levels, then the water would move along its concentration gradient until each side of the membrane are equal. The water moves because the membrane is impermeable to the solute and the solute concentrations may differ on either side of the membrane. Water molecules may move in and out of the cell, but there is no net diffusionRead MoreConclusion And Evaluation Of Osmosis Potato Lab889 Words   |  4 PagesSaam Baharmand Period 5 11 October 2014 Conclusion and Evaluation of Osmosis Potato Lab Hypothesis: I believe that the O Molar (M) solution of sugar and distilled water will be isotonic because there is no sugar in the solution. This Hypothesis was not supported by the results of the lab. 1) The line graph of the data collected shows the least amount of change in mass (1.8%) in the potato soaked in the 0.2M sugar solution. This means that the potatoes soaked in the 0.2M solution were the mostRead MoreOsmosis Lab Report Essay1615 Words   |  7 PagesOsmosis Rates in Artificial Cells Daniel George Department of Biology Grand Valley State University 1 Campus Drive Allendale, MI 49401 georged@mail.gvsu.edu Abstract The lab for this paper was conducted for the topic of osmosis, the movement of water from high to low concentration. Five artificial cells were created, each being filled with different concentrated solutions of sucrose. These artificial cells were placed in hypertonic, hypotonic, or isotonic solutions for a period of 90Read MoreOsmosis In A Decalcified Egg Lab Report1004 Words   |  5 Pages Osmosis in a Decalcified Egg to Determine the Glucose Content of an Egg Tovah King C62 7/5/2017 Abstract: Diffusion is the transfer of molecules from an area that has a higher concentration to an area that has a lower concentration. Osmosis is the diffusion of water. The purpose of this experiment was to study the process of osmosis. In order to test osmosis, eggs that had been soaking in vinegar were taken and placed in four beakers of solution with different levels of glucoseRead MoreCell Membrane Lab Essay927 Words   |  4 PagesLab #1: Cell Membrane Prepared for Gary V. Lawrence Biology 0983 By Zane Jeffels Partners: Lily Juno, Huynh, and Lin Yan Sun Preformed: October 11th, 2010 Due: October 25th, 2010 King Edward Campus- Rm. 3275 Vancouver Community College Abstract The purpose of this lab was to determine if hemolysis would occur, and how long it would take to occur to red blood cells when blood suspension is introduced to solutions prepared at different temperaturesRead MoreG7Ikhgfcutifyguhj1668 Words   |  7 PagesClara Skepple Miranda Wilby, Sarah Cavanagh Thursday, March 3 2016 Observing Diffusion and Osmosis INTRODUCTION: Related Theory: The cell membrane is the outermost boundary of the cell, made up of proteins and lipids. This membrane holds the cell together and establishes the movement of materials that go into and out of the cell. This is a selectively permeable membrane: a barrier that allows some molecules to pass through, but prevents other molecules from penetrating (1). Passive transport isRead MoreThe Concentration Of Solutes Affects The Rate Of Osmosis959 Words   |  4 Pagesof Osmosis Chintan Jani Biology 101-01 Dr. Reynolds October 6, 2016 Abstract The purpose of this lab was to observe the osmosis rates and mass changes of dialysis tubes. To this three-dialysis tubes with differing sucrose levels were tested on their rate of osmosis and weighed at 15-minute intervals. The results found described that as the sucrose level increases the rate of osmosis increased as well. Introduction The purpose of this experiment was to determine if the rate of osmosis has

The Rise of Enlightened Sexism - 622 Words

The rise of enlightened sexism: How pop culture took us from girl power to girls gone wild Douglas’ humorous and well informed way of writing really inspired me. From examples of magazines, media, television shows, films, retail, and even in music she described and compared to us what is going on among these examples and how real women today are really living their lives. Douglas presents an analysis of how women are presented to the public and how we continue to be treated as inferior to men despite the strides of feminism. After reading this book, I even find myself reading or watching something and pretty much look to see if it is women friendly or not. This is something I really never done before until now. This book definitely got me to think about feminism and the role it plays in my life. This book’s major argument is how women are shown by contemporary media and popular culture in mixed messages. Douglas focuses on the ways women are portrayed in popular music, such as dancers wearing barely any clothes and doing inappropriate things in rap videos; to the empowered women warriors in television, such as Xena: Warrior Princess, Dark Angel and Buffy the Vampire Slayer; to the female players, such as Sarah Palin and Hilary Clinton. Her arguments and points are very valid, I personally think. â€Å"Since the 1990s the mass media has increasingly reported that women have â€Å"made it,† that they achieved gender equality. On television women occupy important jobs like doctors,Show MoreRelatedAnalysis Of Disney s And Fat Phobic Appearance Personality Correlation2223 Words   |  9 Pagesare merely scrawl, yet deemed as Arabic by the movie’s creators. Jasmine is far underdressed for her culture, and would have worn longer, looser clothing to show status as a monarch. 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Term Paper on Poverty Free Essays

Term Paper on Poverty Prejudice, affluence, and poverty in America are linked issues. Works by four authors discussed in this essay, Takaki, Fallows, Olds, and Gioia, help us to understand how the social issues of class and race are intertwined, making an analysis of both necessary for an adequate understanding of any one individually. While the authors discussed here approach the issues from different angles, their works taken side by side clearly show us how prejudice helps the affluent shrug off responsibility toward the poor, offering ‘explanations’ as to why some groups (or persons) remain in poverty and others do not. We will write a custom essay sample on Term Paper on Poverty or any similar topic only for you Order Now Additionally, it is argued that those living in affluence – and thus those with the means to significantly address the poverty issue – may, in fact, have a reduced awareness of the existence and reality of poverty. As a result, not only is poverty per se not addressed (we don’t address what we don’t see), but the existing myths and prejudices that help to maintain class divisions, both in society at large and embedded in our legal and social structures, remain unchallenged. However, it is only by examining both the objective nature of the current era together with prejudice and the self-justification of the affluent that one can understand how prejudice, affluence, and poverty are intertwined. The nature of money, according to Gioia’s poem titled simply â€Å"Money†, shapes the reality of life for both the rich and the poor, according to how much they have or don’t have. Gioia’s poem reminds us of the many meanings we accord to money, how we need it and spend it, and how it functions in our economy. One of the clear messages in Gioia’s poem is that money, itself, does not discriminate. It is what it is regardless of who has it, but for those who have it, it grows and multiplies. For those who don’t have it, or don’t have enough of it, it does not. If money itself does not discriminate, how do we account for the gap between those who are affluent and those who are poor? What prevents some from getting it, while others have enough for it to grow? How we answer this question, and the logic behind our answer, is very connected to policy decisions we make concerning poverty, and how effective we are in addressing it. One of our traditional explanations for the why the poor are poor and the rich are rich, according to the American ideology, is that the poor are those who have not worked sufficiently to gain money. Likewise, those who have money, according to the same ideology, are those who have been frugal, worked hard, saved, wisely invested, and who have otherwise ‘lived right’. Takaki, in his article â€Å"Race at the End of History†, provides a summary of how this is embedded in our ideology: â€Å" The American dream still holds promise to all us as Americans. Everyone, regardless of race, can make it into the mainstream through hard work and private effort. † (p. 387). This kind of definition, and the ideology behind it, makes it possible to approach policy issues in such a way that places overwhelming responsibility on those who are poor for their own plight. As Takaki points out, our emphasis is on the fact that success is to be achieved through ‘private’ means, rather than government assistance (p. 387). Addressing poverty then becomes a question of getting those who are not working hard enough, not ‘living right’, to do so. This definition of poverty allows us to say, those who have a lion’s share of wealth deserve that wealth, and those who are in poverty, deserve that poverty. Viewed this way, there is no reason, then, to seriously listen to claims of ‘glass ceilings’ or discrimination, or to look in any other way at prejudices built into our social and legal structures that unfairly increase the odds for some, and reduce them for others. How is it that, in the face of evident continued poverty among certain ethnic or racial groups, we continue to believe in this ideology? Surely, by now enough evidence of systematic discrimination, glass ceilings, and other obstacles for specific racial and ethnic (and gender) groups has shown us that the American dream as summed up by Takaki is based at least partially on a myth. Yet many people still agree with, for example, what Takaki suggests (p. 385) Francis Fukuyama’s explanation is: that poverty is a matter of cultural difference. Parillo, in â€Å"Causes of Prejudice†, and Fallows in â€Å"The Invisible Poor† each help us to understand forces at work that help to perpetuate the myth even in the face of a contradictory reality. Parillo points to prejudice and the continuation of prejudice through the socialization process. Defining prejudice as â€Å"an attitudinal ‘system of negative beliefs, feelings, and action-orientations regarding a certain group or groups of people’† (p. 548), Parillo argues that, through the socialization process, prejudicial views consciously or unconsciously adopted during childhood can then continue into adulthood, and translate into prejudicial choices and behavior in work, social life, and life choices. Additionally, widespread and generally shared prejudicial beliefs and attitudes toward specific groups can be implicitly (or explicitly) reinforced by society at large through, for example, the legal system and cultural norms (p. 557). New generations may not be alert to these subtle reinforcers of prejudicial attitudes and practices, and therefore may not question them. The prevailing stereotypes and prejudices are thus maintained and continued as they are adopted by new generations, and as they continue to be sanctified by the surrounding legal and societal framework. If children acquire their beliefs from their parents through socialization, what prevents them from questioning those values? Surely, we are not all sheep, that unthinkingly accept everything we hear. One explanation that Parillo offers (pp. 550-551) is ‘Self-Justification’, that we need â€Å"reassurance that the things we do and the lives we live are proper, that good reasons for our actions exist. † One way in which this surfaces, he argues, is through a dominant group convincing itself that it is superior to other groups, causing them to associate less frequently or not at all with those groups it deems inferior. Fallows article â€Å"The Invisible Poor† clearly shows how this phenomenon is a reality of our current era of ‘tech wealth’, describing the invisible social barrier between rich and poor people – a barrier so great as to make the poor ‘invisible’ to the rich. Within the tech wealth era, according to Fallows, the production of wealth involves fewer ‘blue collar workers’, so that those directly benefiting from it are not confronted with the realities, struggles, and needs of those less like them. In terms of economic background, there is more similarity between the ‘workers’ producing and benefiting from the new wealth. Second, the nature of work within the tech industry isolates those within it into an insulated world. Long working hours, a minimal amount of leisure time, and social lives primarily focused around those within the same world further contributes to the lack of awareness and connectedness to the rest of the world around them. Third, he points to the ‘racial meritocracy’ of the tech industry, with workers and contributors coming from all corners of the globe. He argues that this racial mix among the tech wealthy leaves them out of touch with the more basic and traditional racial tensions among the less wealthy, and the ways in which those in minority groups not associated with the tech wealthy are still disadvantaged. While Fallows offers a great deal of support for these specific phenomena of the tech wealth era as objective phenomena, which may indeed be at work, combining an analysis of these phenomena with Parrillo’s analysis of prejudice and self-justification offers a fuller understanding of our current era. Sharon Olds, in her poem â€Å"From Seven Floors Up† shows, for example, how even if there are objective forces at work such as those discussed by Fallows, there is still an attitudinal factor at work: when those more affluent are confronted with the reality of poverty, they are looking from seven floors up, through prejudice and self-justification, will more likely (however unwittingly)do not believe it could be a reality of their lives. In sum, given that money itself does not discriminate, and given the overwhelming evidence that there are obstacles to wealth other than the personal failure to achieve the ‘American Dream’, we must look for a fuller explanation of the gap between the rich and the poor. The relationship between affluence and poverty consists not only of objective forces such as new forms of wealth production or characteristics of new economic eras, but more concretely of prejudice. The very real obstacles to wealth encountered by specific societal groups, and embedded in our social and legal structures ,are not only due to the transference of values from one generation to the next, but due to the continued need for self-justification among the affluent. The product of self-justification, prejudice, is the link between affluence and poverty that needs to be analyzed and addressed if social policies concerning poverty are to be effective. How to cite Term Paper on Poverty, Essays