Anatomy and Phys Study

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Physioex 9.0
Review Sheet
Exercise1
Cell Transport Mechanisms and Permeability
Name ___
Lab Time/Date ___
Activity 1 Simulating Dialysis (Simple Diffusion)
1.Describe two variables that affect the rate of diffusion. ___ ___
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? ___ 3.Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your prediction? ___ ___

4.Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. ___ ___
Activity 2 Simulated Facilitated Diffusion
1.Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it differs.___ ___
2.The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucose transport. Explain why the rate increased. How well did the results compare with your prediction? ___ ___

3.Explain your prediction for the effect Na+Cl− might have on glucose transport. In other words, explain why you picked the choice that you did. How well did the results compare with your prediction? ___ Activity 3 Simulating Osmotic Pressure

1.Explain the effect that increasing the Na+Cl− concentration had on osmotic pressure and why it has this effect. How well did the results compare with your prediction? ___ ___
2.Describe one way in which osmosis is similar to simple diffusion and one way in which it is different. ___ ___
3.Solutes are sometimes measured in milliosmoles. Explain the statement, “Water chases milliosmoles.” ___ ___
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? ___ ___

Activity 4 Simulating Filtration
1.Explain in your own words why...
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