Which of the following statements concerning the absolute refractory period is NOT accurate? A)The absolute refractory period refers to the period of time during which another action potential cannot be initiated in a patch of membrane that has just undergone an action potential, no matter how strong the stimulus. B)The absolute refractory period corresponds to the time period during which the Na⁺ gates are first opened and then closed and inactivated. C) Immediately following the absolute refractory period, the patch of nerve fibre membrane that has just undergone an action potential can be restimulated only by a stronger stimulus than is usually necessary. D) The absolute refractory period occurs during the after hyperpolarization phase of the action potential.

Question

Quizplus · Accepted Answer

The absolute refractory period occurs during the depolarization and repolarization phases of the action potential, not during the after hyperpolarization phase. During the after hyperpolarization phase, the membrane potential is below the resting membrane potential, but the absolute refractory period has already passed.

Which of the Following Statements Concerning the Absolute Refractory Period