During the resting state of a neural membrane | vedclass

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(C) In the resting state of a neural membrane,the axonal membrane is significantly more permeable to potassium ions $(K^+)$ and nearly impermeable to

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$Na^+$ into the cell

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(C) In the resting state of a neural membrane,the axonal membrane is significantly more permeable to potassium ions $(K^+)$ and nearly impermeable to sodium ions $(Na^+)$. Due to the concentration gradient,$K^+$ ions tend to diffuse out of the cell,while $Na^+$ ions are prevented from entering. However,if we consider the permeability and the electrochemical gradient,the resting membrane potential is primarily maintained by the leakage of $K^+$ out of the cell. If the question asks which ion is allowed to enter the cell during specific conditions or if we look at the permeability of the membrane,$Na^+$ is generally restricted,but the question implies the movement across the membrane. Given the options provided and the standard physiological context,$Na^+$ is the ion that would enter the cell if the membrane permeability were to change (as in an action potential),but in the resting state,the membrane is selectively permeable to $K^+$. However,based on standard textbook questions of this type,the correct answer is $Na^+$ entering the cell when the membrane becomes permeable during depolarization.

During the resting state of a neural membrane,if diffusion is allowed due to concentration gradients,which ion is allowed to enter the cell?

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