(C) The generation of an action potential in the nervous system occurs due to the rapid influx of $Na^+$ ions into the axoplasm through voltage-gated

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Assertion is correct,but Reason is incorrect.

(C) The generation of an action potential in the nervous system occurs due to the rapid influx of $Na^+$ ions into the axoplasm through voltage-gated sodium channels.This influx causes depolarization of the axonal membrane.The Reason statement is incorrect because the influx of $Na^+$ ions is driven by the electrochemical gradient,not by the efflux of $K^+$ ions.In fact,during the depolarization phase,$K^+$ channels are typically closed.

Class 11 Biology Neural Control and Coordination Generation and conduction of Nerve Impulse

Medium

$A$: 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
Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
B
Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
C
Assertion is correct,but Reason is incorrect.
D
Both Assertion and Reason are incorrect.

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Class 11

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Chapter

Neural Control and Coordination

Subtopic

Generation and conduction of Nerve Impulse

In a resting neuron,the axonal membrane is

Medium

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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.

Easy

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When a neuron is not conducting any impulse,the axonal membrane is comparatively more permeable to $K^+$ ions and nearly impermeable to $Na^+$ ions.

MediumAIIMS 2015

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What is action potential?

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Conduction of an impulse along the axon is associated with the

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$A$: 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.

Similar Questions

In a resting neuron,the axonal membrane is

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.

When a neuron is not conducting any impulse,the axonal membrane is comparatively more permeable to $K^+$ ions and nearly impermeable to $Na^+$ ions.

What is action potential?

Conduction of an impulse along the axon is associated with the

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$A$: 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.

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.