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Question

After generation of action potential, the recovery process is called _____.


A

Depolarisation

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B

Hyperpolarization

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C

Repolarisation

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D

No change

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Solution

The correct option is C

Repolarisation


After generation of action potential, the recovery process is called repolarization. The onset of action potential is marked by the opening of voltage-gated Na+ channels. The depolarisation that occurs due to this causes the neuron membrane to attain a voltage that triggers the opening of voltage-gated K+ channels. Then K+ ions rush out through this channels, reducing the positive charge inside the neuron and causing repolarisation of the neuronal membrane.


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