Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Activity 1: Simulating Dialysis (Simple Diffusion) • Describe two variables that affect the rate of diffusion: Two variables that affect the rate of diffusion are size and concentration gradient. The molecular size vs the MWCO size of the membrane can either increase‚ decrease‚ or prevent diffusion. The greater the concentration gradient the greater the diffusion rate due to molecules moving from areas of higher concentration
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The Cell: Transport Mechanisms and Cell Permeability 1. Molecular motion: A and D 2. Velocity of molecular movement: B and C 4. Size of pores. Solubility in the lipid portion of the membrane and/or presence of membrane “carriers” for the substance(s). 5. Glucose- (a) move into the sac Albumin- (c) no movement Water- (b) move out of the cell NaCl- (a) move into the celll 7. Hypertonic- C- crenated Isotonic- B Hypotonic- A- hemolysis‚ bursting open due to swelling
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150 mg/dl of protein may normally be excreted into the urine. In glomerular proteinuria‚ an increase in glomerular permeability occurs‚ resulting in an increase of urine proteins. High urine protein concentration therefore may indicate proteinuria. Blood glucose concentration above the renal threshold will overflow into the urine. This situation normally arises in diabetes patients. In renal diabetes‚ the renal threshold is reduced to the point where sugar appears in the urine
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Blood for Sale Case Study Blood for Sale Ethics Phil-245 I found the article called Blood for Sale very intriguing. Many questions arose from this on my mind. The most obvious is‚ how ethical is it to sell blood to people who need it? The other issue that bothered me is‚ how ethical is it to underpay and overcharge for that blood? My initial reaction to this was complete disbelief. I found it hard to understand how anyone could do some of the things mentioned until I reread the article
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Rotten Blood Critic Shannon Winnubst says‚ “The collective nightmare AIDS performs some of our worst cultural anxieties about desire‚ fear‚ and aggression; about gender‚ sexuality‚ and race; about history‚ bodies‚ and violence.” As unpleasant as it is to deal with AIDS Patients (vampires)‚ when a crime results in bloodshed‚ the blood left behind functions as evidence for investigators (people). A bloodstain pattern analyst (people stereotypes) can’t simply glance at drips and smears of blood and immediately
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partially supported because glucose left the bag and is proven by the positive test on the surrounding water. Also the beaker turned orange because of osmosis which attests to glucose leaving the bag. Iodine Potassium Iodine and water entered the bag. This was proven by the color change in the starch test as the bag turned black also because of osmosis. The only thing that the hypothesis lacked was that starch did not move at all. The beaker stayed yellow before and after because the bag is not permeable
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to talk to you about the importance of donating blood. Some of you may know a friend or even a family member who has received blood at some time. I for one have received blood and I often wonder who took the time to donate it. According to the Journal of American Medical Association‚ it is noted that just 1 pint of blood can save three lives. Why You Should Give Giving blood does not just benefit recipients. Regardless of age‚ donating blood offers many benefits for donors. It lets you:
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which he called cells’ this in itself unbeknownst to him‚ was the discovery of the fundamental unit of all living things. In 1838 a botanist called Schleiden derived the theory The basic unit of structure and function of all living organisms is the cell.’ Over 150 years later this can be regarded as one of the most familiar and important facts within the biological fields. Drawing of cork cells published by Robert Hooke 1665 The Cell itself and use
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How Do Different Factors Affect Osmosis Aim: To discover The Different factors that affect osmosis. Factors that affects the rate of osmosis in a potato: * Time * Temperature * Molar * Sucrose solution * NaCl solution * Concentration of liquid * Age of the potato * Variety of the potato * Potassium‚ K(AQ) Factor Chosen: Different Molar of Sucrose Solution In this investigation I will change the molar of sucrose solution to find the increase or decrease
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Stem cells are unique because they have the ability to generate new cells of any kind during early life and growth. There are about 200 different types of cells in the body; such as muscle‚ skin and brain cells. Most of these cells have to be repaired or replaced once in a while. For example our taste buds are replaced every 10 days‚ skin cells every couple of weeks and liver cells every 300-500 days. Stem cells serve as an internal repair system dividing essentially without limit to replenish
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