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Unformatted text preview: permeabilities, potentials and threshold. 5. Understand the basis for regenerative sodium entry into the cell when threshold is reached. 6. Explain the roles of sodium and potassium in producing the waveform of the action potential. III. Sample Problems: 1. How might extracellular Ca++ increase the excitability of a nerve cell? 2. How will decreasing the extracellular K+ affect the waveform of the action potential and the duration of the relative refractory period? 3. Does moving the threshold closer to the resting potential make a cell more or less excitable? Explain your answer. file:///C|/WINWORD/COURSES/31107/Lec8-07.HTM8/15/2007 10:16:55 AM...
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This note was uploaded on 04/22/2009 for the course BIO 311 taught by Professor Baustian during the Fall '08 term at Cornell University (Engineering School).
- Fall '08