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Unformatted text preview: PSL 431 – Cell Physiology – Practice Exam 1 – Fall 2006 1. The Nernst potential for ion Y+ across the plasma membrane is -130 mV. Therefore A. this ion is considerably more concentrated in the ECF than the cytoplasm. B. there is a large concentration force driving Y+ out of the cell. C. opening a pathway for Y+ would cause membrane depolarization. D. this description fits the conditions for Y + being Na+. E. None of the above are true. 2. In which of the following is a transport protein correctly matched with its transport function? A. ryanodine channel-- efflux of Ca++ from cardiac muscle cells B. glucose/Na+ symporter-- glucose uptake by kidney cells C. CFTR—Na+ efflux in cystic fibrosis D. Na+ K+ pump – paracellular transport of Na+ E. nAchR—influx of Ca++ during long term potentiation....
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- Spring '07
- long term potentiation