Which of these statements does NOT apply to the absolute refractory period
A)It 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)It corresponds to the time period during which the Na⁺ gates are first opened and then closed and inactivated.
C)Immediately following it, 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)It occurs during the after hyperpolarization phase of the action potential.

Question

Quizplus · Accepted Answer

The after hyperpolarization phase of the action potential is not part of the absolute refractory period. The absolute refractory period starts at the beginning of the action potential and ends when the inactivated Na⁺ channels have recovered. During this period, no amount of stimulus can trigger another action potential.

Which of These Statements Does NOT Apply to the Absolute