Question

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

• A. Depolarisation
• B. Hyperpolarization
• C. Repolarisation
• D. No change

Answer 1

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.