Physio 9.0 Lab 1:3 Essay

956 Words Aug 31st, 2012 4 Pages
Exercise 1: Cell Transport Mechanisms and Permeability: Activity 3: Simulating Osmotic Pressure Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Which of the following is true of osmosis? You correctly answered: c. It is a type of diffusion. 2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is You correctly answered: a. the concentration of nondiffusing solutes. 4. The net movement of water would be into the cell in a You correctly answered: b. hypotonic solution.


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Experiment Results Predict Question: Predict Question 1: What effect do you think
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3. Solutes are sometimes measured in milliosmoles. Explain the statement, “Water chases milliosmoles.” Your answer: When solute concentrations increase, the water concentration decreases. In Osmosis, water concentrations are different on two sides of a membrane. The side which contains a low concentration of solvent (water) ususally contains a high concentraion of solutes (molecules). The other side of the membrane then would have a high concentration of solvent (water) and a low concentraion of solute (molecules). The side of the membrane with high water concentraion allows osmosis where those water molecules diffuse to the other side of the memrane which contain the low concentration of solvents (water) or that contain a higher concentraion of solutes (molecues). 4. The conditions were 9 mM albumin in the left beaker and 10 mM glucose in the right beaker with the 200 MWCO membrane in place. Explain the results. How well did the results compare with your prediction? Your answer: I must have gotten my left and right mixed up again. I knew that pressure would build up on the side containing the 9Mm albumin. I predicted this becasue I knew the 10 Mm of glucose could move from the right beaker to the left and equilibrium would be reached resulting in both beakers having the same glucose concentraion. When both beakers had the same concentraion of glucose, the albumin couldn't move across the

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