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Answer to Question #56069 in Human Anatomy and Physiology for SU

Question #56069
Which of the following is not happening during the depolarizing phase of an action potential?

a.
The cell membrane depolarizes
b.
Potassium voltage-gated channels open
c.
Sodium voltage-gated channels open
d.
The potential difference reverses (the inside of the cell actually gets slightly positive)
e.
All of the above occur during the depolarization phase of an action potential
Expert's answer
b. Potassium voltage-gated channels open
This process leads to potassium movement out of the cell. And it happens during repolarization. All the rest processes do happen during depolarization.

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