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Why does hyperpolarization occur during the action potential?

A. Voltage-gated potassium channels close quickly
B. Voltage-gated potassium channels are slow to close
C. Voltage-gated sodium channels close quickly
D. Voltage-gated sodium channels are slow to close

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Final answer:

Hyperpolarization in action potential is caused by the delayed opening of voltage-gated potassium channels, allowing potassium ions to leave the cell.


Explanation:

Hyperpolarization during the action potential occurs due to the opening of voltage-gated potassium channels. These channels open more slowly than sodium channels and allow potassium ions to leave the cell, making the membrane more negative. This process leads to the falling phase of the action potential.


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