Give the correct statement about nerve fibre’s resting stage:

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More permeable to K+

More permeable to Na+

Less permeable to K+

Equally permeable to Na+ and K+

answer is A.

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Detailed Solution

Concept: The difference in action potential across the membrane due to the presence of ion-gated channels like K+ and Na, action potential generated.
Nerve fibre is in the resting stage, meaning the neurons do not conduct any impulses. In this condition, a membrane of the axon is less permeable to K+ and almost impermeable to Na+. The resting nerve fibre is the nerve fibre that is not conducting an impulse. In this fibre, the sodium ions (Na+) predominate in the extracellular fluid, whereas the potassium ions (K+) predominate in the intracellular fluid. The plasma membrane is electrically positive outside and negative inside.
Therefore the correct statement about nerve fibre’s resting stage is more permeable to K+.
Hence, the correct answer is option 1.

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