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

Similar Questions

$A$: Presence of myelin sheath increases the rate of conduction of nerve impulse.
$R$: Ionic channels are absent in the area covered by myelin sheath; therefore,depolarization occurs only at the nodes of Ranvier,resulting in saltatory or jumping conduction.

Which of the following statements is/are correct?
$(a)$ The electrical potential difference across the resting plasma membrane is called the resting potential.
$(b)$ $Na^+$ ions are responsible for the generation of an action potential.
$(c)$ $A$ nerve impulse is an action potential.

The mineral necessary for nervous conduction is

During the transmission of a nerve impulse,which of the following events occurs?

The depolarization of nerve membrane takes place through influx of . . . . . . ions.

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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