(D) The axonal membrane of a neuron in a resting state is significantly more permeable to potassium ions $(K^+)$ and nearly impermeable to sodium ions

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If the Assertion is incorrect but the Reason is correct.

(D) The axonal membrane of a neuron in a resting state is significantly more permeable to potassium ions $(K^+)$ and nearly impermeable to sodium ions $(Na^+)$. Therefore,the Assertion $(A)$ is incorrect.In a resting state,the neuron is polarized and does not conduct any nerve impulse. Therefore,the Reason $(R)$ is correct.

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

Medium

Assertion $(A)$: The axonal membrane of the neuron is more permeable to sodium ion $(Na^+)$ and nearly impermeable to potassium $(K^+)$.
Reason $(R)$: In a resting state,a neuron does not conduct any impulse.

AIIMS 2016 All AIIMS

A
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
B
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
C
If the Assertion is correct but Reason is incorrect.
D
If the Assertion is incorrect but the Reason is correct.