A nerve impulse will travel through a nerve f | vedclass

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(C) The conduction of a nerve impulse along a nerve fibre is initiated by the process of depolarisation.When a stimulus is applied to the nerve fibre,

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Sodium ions

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(C) The conduction of a nerve impulse along a nerve fibre is initiated by the process of depolarisation.When a stimulus is applied to the nerve fibre,the membrane permeability for $Na^+$ ions increases significantly.This leads to a rapid influx of $Na^+$ ions into the intracellular space,causing the membrane potential to shift from a resting state (negative) to a depolarised state (positive).Therefore,the sudden increase in permeability to $Na^+$ ions is essential for the generation and propagation of an action potential.

$A$ nerve impulse will travel through a nerve fibre only if the membrane suddenly becomes more permeable to

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