AP PSYCHOLOGY

Detailed explanation-1: -An important characteristic of the action potential is the refractory period, which is the time after initiation of an action potential when it is impossible or more difficult to generate a second action potential.

Detailed explanation-2: -By definition, the refractory period is a period of time during which a cell is incapable of repeating an action potential. In terms of action potentials, it refers to the amount of time it takes for an excitable membrane to be ready to respond to a second stimulus once it returns to a resting state.

Detailed explanation-3: -The refractory period is the time after an action potential is generated, during which the excitable cell cannot produce another action potential.

Detailed explanation-4: -This situation will continue until all Na+ channels have come out of inactivation. The period during which a stronger than normal stimulus is needed in order to elicit an action potential is referred to as the relative refractory period (RRP).

Detailed explanation-5: -(A) Na+ channel inactivation is responsible for the absolute refractory period. (B) The absolute refractory period is the time during which another stimulus given to the cell (no matter how strong) will not lead to a second action potential.