GENERAL HISTOLOGY

Detailed explanation-1: -In physiology, a refractory period is a period of time during which an organ or cell is incapable of repeating a particular action, or (more precisely) the amount of time it takes for an excitable membrane to be ready for a second stimulus once it returns to its resting state following an excitation.

Detailed explanation-2: -The absolute refractory period is the interval during which a second action potential absolutely cannot be initiated, no matter how large a stimulus is applied. The relative refractory period is the interval immediately following during which initiation of a second action potential is inhibited but not impossible.

Detailed explanation-3: -refractory period. noun. : the brief period immediately following the response especially of a muscle or nerve before it recovers the capacity to make a second response. called also refractory phase.

Detailed explanation-4: -In summary, the relative refractory period is a time in which the neuron can fire an action potential, but it needs a greater stimulus. During an action potential, voltage-gated sodium channels open to let in positive ions-sodium. These depolarize the cell.