Biology / Bio 2821 · Atom · ~20 seconds
Resting Membrane Potential
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A resting neuron holds its interior near −70 millivolts relative to its exterior, maintained by more potassium leak channels than sodium and by the pump, per Bio 0362.
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Potassium ions leak out of the resting cell faster than sodium leaks in, leaving the interior negative.
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The exact resting value varies by neuron and species — the mechanism, not the number, is stable.