Physio 9.0 Lab 1:3

Topics: Osmosis, Diffusion, Concentration Pages: 3 (972 words) Published: September 16, 2012
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 increasing the Na+ Cl- concentration will have? Your answer : a. increased pressure Predict Question 2: What do you think will be the pressure result of the current experimental conditions? Your answer : b. pressure above the right beaker Stop & Think Questions: Why do you think there is no pressure change? You correctly answered: b. Sodium is able to diffuse through the pores. Why do you think there was no pressure change? You correctly answered: c. There is no net movement of water because the solute concentrations are the same. Experiment Data: Run Number 1 2 3 4 5 6 7 Solute Na+ ClNa+ ClNa+ ClGlucose Glucose Glucose Albumin Glucose MWCO 20 20 50 100 100 200 200 200 Start Conc. L 5.00 10.00 10.00 8.00 8.00 8.00 9.00 0.00 Pres. L 170 340 0 136 0 0 153 153 Start Conc. R 0.00 0.00 0.00 0.00 8.00 0.00 0.00 10.00 Pres. R 0 0 0 0 0 0 0 0 Rate 0.0000 0.0000 0.0167 0.0000 0.0000 0.0036 0.0000 0.0044

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Post-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. If you double the concentration of a nondiffusible solute that is on one side of a membrane, the osmotic pressure will You correctly answered: c. double. 2. Which membrane did not allow Na+ Cl- to pass through? You correctly...
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