Cell Transport Mechanisms and Permeability: Computer Simulation

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Simple Diffusion
1. The following refer to Activity 1: Simulating Dialysis (Simple Diffusion). Which solute(s) were able to pass through the 20 MWCO membrane? According to your results, which solute had the highest molecular weight? ______________________________________ Which solute displayed the highest rate of diffusion through the 200 MWCO membrane? __________________________ Using the data from Chart 1, explain the relationship between the rate of diffusion and the size of the solute. Facilitated Diffusion

2. The following refer to Activity 2: Simulating Facilitated Diffusion. Did any of the substances travel against their concentration gradient? Explain why or why not. Using your results from Chart 2, what was the fastest rate of facilitated diffusion recorded? _______________. Describe the conditions that were used to achieve this rate. ___________________________________________________________ Name two ways to increase the rate of glucose transport. _____________________________________________________ Did NaCl affect glucose transport? ____________________________________________________________

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Did NaCl require a transport protein for diffusion? Why or why not? ____________________________________________ Cell Transport Mechanisms
and Permeability:
Computer Simulation
E X E R C I S E
NAME ____________________________________
LAB TIME/DATE ________________________
version 8
Osmotic Pressure
3. The following refer to Activity 3: Simulating Osmotic Pressure. For NaCl, which MWCO membrane(s) provided for the net movement of water without movement of NaCl? Explain how you determined this. (Hint: Correlate your results to the data in Chart 3.) ______________________________ For glucose, which MWCO membrane(s) provided for the net movement of glucose without net movement of water? Explain how you determined this. ____________________________________________________________

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Is osmotic pressure generated if solutes...
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