At the threshold for generating an action potential: A)The membrane is at the K⁺ equilibrium potential. B)The conductances for Na⁺ and K⁺ are equal. C)There is a rapid opening of voltage-gated Na⁺channels. D)K⁺conductance is maximal. E)The transmembrane voltage is zero.

Question

Quizplus · Accepted Answer

At the threshold for generating an action potential, there is a rapid opening of voltage-gated Na+ channels. This allows for a temporary influx of Na+ ions, which depolarizes the membrane and triggers the action potential. Choices A, B, D, and E are not accurate descriptions of the threshold for generating an action potential.

At the Threshold for Generating an Action Potential