The Afterhyperpolarization That Follows the Action Potential

Question

The afterhyperpolarization that follows the action potential: A)Results primarily from to the inactivation of voltage-gated Na⁺ channels. B)Makes it easier to trigger another action potential. C)Is the main cause of the relative refractory period. D)Makes it impossible to fire another action potential. E)Is the consequence of continuing K⁺ influx.

Accepted Answer

The afterhyperpolarization is a period of hyperpolarization that follows the action potential and makes it more difficult to trigger another action potential. This is known as the relative refractory period. The afterhyperpolarization is caused by the efflux of K+ ions from the cell, which causes the membrane potential to become more negative than the resting potential. It is not caused by the inactivation of voltage-gated Na+ channels, the influx of K+ ions, or the impossibility of firing another action potential.