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PSYC 4640 (5)
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Lecture 5

PSYC 4640 Lecture 5: actionpothandout

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Department
Psychology
Course Code
PSYC 4640
Professor
Kelly

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Description
1. The neurons resting potential is 70mV; the charge is slightly negative inside the cell relative to outside the cell. 2. At rest, Na+s concentration and electrical gradients are driving it into the cell, but its gates are closed. 3. At rest, K+s concentration gradient is driving it out of the cell, and its electrical gradient is driving it into the cell, but its gates are closed. 4. Once threshold is reached [~ 55mV], an action potential occurs. Na+ gates open wide and Na+ rushes into the cell, the charge overshooting 0 so that the cell becomes positively charged [inside]. This causes Na+s electrical gradient to now drive it OUT of the cell this opposition of gradients closes the Na+ gates. 5. At about the peak of
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