Nerve impulse initiates with the movements of

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(D) The initiation of a nerve impulse occurs when a stimulus is applied to a neuron. This stimulus causes the opening of voltage-gated $Na^+$ channels

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$Na^+$

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(D) The initiation of a nerve impulse occurs when a stimulus is applied to a neuron. This stimulus causes the opening of voltage-gated $Na^+$ channels. Consequently,$Na^+$ ions rush into the axoplasm from the extracellular fluid. This rapid influx of $Na^+$ ions causes the membrane potential to change from a resting state (negative) to a depolarized state (positive),which is the fundamental step in the generation of an action potential.

Similar Questions

Define the following terms:
$(1)$ Nerve impulse
$(2)$ Resting potential

Saltatory conduction occurs in

Saltatory conduction is observed in which of the following?

$A$ : The imbalance in the concentration of $Na^+, K^+$ and proteins generates the resting potential.
$R$ : To maintain the unequal distribution of $Na^+$ and $K^+$,the neurons use electrical energy.

What is action potential?

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