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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for the movement of substances across the plasma membrane‚ and to indicate the driving force for each. This may also be applied to the study of transport mechanisms in living membrane-bounded cells. Also‚ understanding of which way substances will move passively through a deferentially permeable membrane depending on the concentration differences. We used PhysioEx software to examine diffusion. In these experiments we used different sized membranes as well as NaCl‚ urea‚ glucose‚ albumin‚ powdered
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9.0 Review Sheet Exercise 1 Cell Transport Mechanisms and Permeability Name: Jeffery Cook Lab Time/Date: 12pm 2/09/2015 Activity 1 Simulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. a. Two variables that affect the rate of diffusion are size and whether or not there is an electrical or concentration gradient. 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? a
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Chronic Kidney Disease BIO 105‚ sec M02 Prof. Palanca Ayo Powell (Term Paper) 3/25/12 The Kidney is one of the most important organs in the human body. Its primary function is the removal of waste & toxins from the blood stream. So if the kidney stopped working correctly and is no longer able to properly function that would lead to serious problems. Blood is no longer being cleaned. The waste and the toxins aren’t being removed. Instead it’s all building up in the blood stream causing
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movement is along the concentration gradient‚ simple diffusion does not require energy therefore it is ’passive’‚ substances are diffused across the membrane between the phospholipids. Materials and methods: * 20 mwco dialysis membrane * 50 mwco dialysis membrane * 100 mwco dialysis membrane * 200 mwco dialysis membrane * Membrane holder * NaCl concentration * Urea * Albumin * Glucose * Deionized water * Beakers The experiment wasn’t done in an actual
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P4: Explain the role of the kidney in the homeostatic control of water balance P5: Explain dysfunction in relation to water balance and possible treatments M3: Discuss dysfunction in relation to water balance and possible treatments D2: Analyse the impact on the human body of dysfunctions in relation to water balance For P4‚ I’m going to outline the physiological overview of the kidneys and then I am going to explain the renal system. Also I am going to explain the kidneys in more detail.
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immune system’s uncontrolled inflammatory response to a severe illness or injury o Inflammatory response: cytokines and chemokines out of control ▪ Peripheral vasodilation = hypotension ▪ Capillary leak/permeability = fluids shifts = edema ▪ Clotting cascade = emboli get stuck in capillary beds = tissue hypoxia • Can develop quickly following major surgery‚ trauma‚ or severe burns OR slowly in the case of infection the turns into sepsis
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Writing III – Acid-Base Balance Congestive heart failure (CHF) is caused by the inability of the heart to fill correctly‚ eject blood completely‚ or a combination of the two‚ which results in a decrease in cardiac output. Chronic hypertension (CH) is a constantly elevated blood pressure. Peripheral vascular disease (PVD) causes a restriction in blood circulation due to atherosclerosis‚ fatty deposits on the inner linings of the arteries that cause a blockage of blood flow; arteriosclerosis‚ loss
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Cell membranes are a bilayer make up of phospholipids‚ proteins‚ and cholesterol. Its main function is to regulate what comes in and out of the cell by means of diffusion‚ transport proteins and protein channels. Trans membrane proteins transport polar solutes across hydrophobic regions of the bilayer. Diffusion occurs when solutes are transferred from a high concentration of that solute to a lower concentration of solutes. Solutes do not depend on the concentration of other solutes‚ which allows
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on the pole bean plants. I would also weigh the plants to find out their overall mass. I would also find out how much sugar is being produced by photosynthesis Cellophane is a thin‚ transparent sheet made of regenerated cellulose. Its low permeability to air‚ oils‚ greases and bacteria makes it useful for food packaging. It’s clear‚ it’s handy‚ and it’s wrapped around my candy. The cellophane wrap is one of the most versatile discoveries of the 1900s. Intended to be a protective textile‚ the
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