Reset Help +30 +30 higher more depolarizes resting potential -70 threshold Time

Question

Reset Help +30 +30 higher more depolarizes resting potential -70 threshold Time (msec) Time (msec) less K* When extracellular K is slightly elevated will leave the nerve cell when it is repolarizing and as a result the cell will stabilize at a resting potential that is This resting potential is closer to Since a cell fires when its potential reaches When extracellular K+ is normal, the nerve normally and returns to its original than normal , this cell will fire easily The patient will experience cramps and tingling

Explanation / Answer

When extracellular K+ is normal, the nerve repolarizes normally and returns to its resting potential.

When extracelular K+ is slightly elevated, less K+ will leave the nerve cell when it is repolarizing, and as a result the cells will stabilize at a resting potential that is higher that normal. This resting potential is closer to threshold. Since a cell fires when its potential reaches threshold, this cell will fire more easily. The patient will experience cramps and tingling.

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