A resting neuron is 4-5 times more permeable to potassium ions i.e K+ as there is a large number of open channels for the passage of ions.
At a normal resting period, the membrane is highly permeable to potassium ions (K+) because sodium ions are expelled out from the cells and potassium ions are forced inward the cell.
At this moment, the sodium-potassium gradient pump operates efficiently in order to exchange potassium inward and sodium outward the cell creating a potential gradient across the cell membrane. Moreover, in this case, the value of resting permeability of potassium ions is 1 as compared to sodium ions i.e. 0.4 much lower than potassium.
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