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problem set 6 - Kristina Madore November 12 2007 Problem...

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Kristina Madore November 12. 2007 Problem Set 6 1. a. At rest, the Potassium ATP channels will be open. The resting membrane potential would be very negative because these channels allow Potassium to to move. Thus, this will bring the membrane potential close to Potassium’s electrochemical equilibrium potential (E k ), which in this case would be negative. b. When glucose enters cells and become processed, the cells convert ADP to ATP. This would make the concentration of ATP in the cells greater than the concentration of ADP. During this situation, the Potassium channels would close. Since the K+ channels have closed, K+ will no longer be able to move through the membrane. Therefore, the resting membrane potential would become more positive because Na+ would still be able to travel through the membrane. The cells would depolarize, or become more positive, so I would expect insulin to be released. c. The K+ channels would open at rest, but would not close when ATP concentration rose in the cell.
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