What Happens When the Resting Nerve is Stimulated to Threshold

Question

What happens when the resting nerve is stimulated to threshold potential? A) The efflux of K⁺ restores the resting membrane potential. B) An action potential fires. C) The Na⁺/K⁺ pump further depolarizes the cell. D) The membrane permeability to Na⁺ decreases.

Accepted Answer

When the resting nerve is stimulated to threshold potential, an action potential is fired. This occurs when depolarization reaches a critical threshold, causing a rapid influx of Na+ ions and reversal of the membrane potential.