The action potential in a neuron is generated | vedclass

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(D) The action potential in a neuron is generated by the rapid influx of $Na^{+}$ ions into the cell.When a stimulus is applied to a neuron,the voltag

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$Na^{+}$

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(D) The action potential in a neuron is generated by the rapid influx of $Na^{+}$ ions into the cell.When a stimulus is applied to a neuron,the voltage-gated $Na^{+}$ channels open,allowing $Na^{+}$ ions to rush into the intracellular space.This influx causes depolarization of the neuronal membrane,shifting the membrane potential from its resting state (approximately $-70 \ mV$) to a positive value (approximately $+30 \ mV$ to $+45 \ mV$).Therefore,the correct answer is $Na^{+}$.

The action potential in a neuron is generated by which of the following?

Similar Questions

Give scientific reasons:
$(1)$ There is no physical connection between sequential neurons,yet nerve impulses are conducted through them.
$(2)$ The neuroplasm of a neuron contains a high $K^+$ concentration during the maintenance of the resting potential.

$A$: In the nervous system,the generation of an action potential depends upon the influx of sodium ions into the axoplasm.
$R$: The influx of sodium ions during nerve impulse generation is due to the efflux of potassium ions.

$A$: 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.

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

If the inside of the membrane becomes more negative,it leads to:

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