Predict Question 1: What effect do you think increasing the number of protein carriers will have on the glucose transportrate? Predict Question 2: What effect do you think adding Na+ Cl- will have on the glucose transport rate? Stop & Think Questions:What happened to the glucose transport rate when the glucose concentration was increased from 2 mMto8 mM? Describe the conditions that resulted in the fastest rate of glucose transport. Why do you think equilibrium wasn't reached? Experiment Data: Run Number Solute Start Conc. L Start Conc. R Carriers Rate 1 Glucose 2.00 0.00 500 0.0008 2 Glucose 8.00 0.00 500 0.0023 3 Glucose 2.00 0.00 700 0.0010 4 Glucose 8.00 0.00 700 0.0031 5 Glucose 10.00 0.00 100 0.0017# 6 Na+ Cl- 0.00 2.00 700 0.0042 6 Glucose 2.00 0.00 700 0.0010
05/19/13 page 3 Post-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. What variable(s) increased the rate of facilitated diffusion of glucose? 2. For facilitated diffusion, increasing the concentration of glucose on one side of the membrane is the same as 3. When all of the membrane carriers are engaged, or busy, we say they are 4. Na+ Cl- had no effect on glucose transport because
05/19/13 page 4 Review Sheet Results 1. Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it is different fromsimple diffusion. 2. The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucosetransport. Explain why the rate increased. How well did the results compare with your prediction?
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- Fall '13
- Osmosis, Sodium, Molecular diffusion