When a nerve fiber is stimulated,what does th | vedclass

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(C) When a nerve fiber is at rest,the axonal membrane is more permeable to $K^+$ ions and nearly impermeable to $Na^+$ ions. This maintains a resting

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Positively charged

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(C) When a nerve fiber is at rest,the axonal membrane is more permeable to $K^+$ ions and nearly impermeable to $Na^+$ ions. This maintains a resting potential where the inner surface is negatively charged.When a stimulus is applied,the membrane becomes freely permeable to $Na^+$ ions,causing a rapid influx of $Na^+$ into the cell.This sudden influx of $Na^+$ ions reverses the polarity of the membrane,making the inner surface positively charged relative to the outer surface. This state is known as depolarization.

When a nerve fiber is stimulated,what does the inner surface of the membrane become?

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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.

$A$ nerve impulse is generated in a nerve fiber when the membrane becomes more permeable to:

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