Which of these processes occur during repolar | vedclass

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(A) Repolarization is the process of restoring the resting membrane potential of a neuron after depolarization.During depolarization,the membrane is h

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$(II)$ and $(IV)$

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(A) Repolarization is the process of restoring the resting membrane potential of a neuron after depolarization.During depolarization,the membrane is highly permeable to $Na^+$. As the action potential reaches its peak,the voltage-gated $Na^+$ channels close (Process $II$).Simultaneously,the voltage-gated $K^+$ channels open (Process $IV$),allowing $K^+$ ions to flow out of the nerve fibre.This efflux of $K^+$ ions makes the interior of the membrane negative again relative to the exterior,thereby restoring the resting potential.Therefore,the correct processes are the closing of $Na^+$ channels and the opening of $K^+$ channels.

Which of these processes occur during repolarisation of nerve fibre?
$(I)$. Open $Na^+$ channel
$(II)$. Closed $Na^+$ channel
$(III)$. Closed $K^+$ channel
$(IV)$. Open $K^+$ channel

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Which of these processes occur during repolarisation of nerve fibre?$(I)$. Open $Na^+$ channel$(II)$. Closed $Na^+$ channel$(III)$. Closed $K^+$ channel$(IV)$. Open $K^+$ channel