During Relative Refractory Period?

By definition, the refractory period is a period of time during which a cell is incapable of repeating an action potential. ... The relative refractory period is the interval of time during which a second action potential can be initiated, but initiation will require a greater stimulus than before.

What channels are open during relative refractory period?

While the K+ channels are open, the cell is in the relative refractory period. Only a very large depolarization will cause a signal, because as the Na+ flows in, in an attempt to create an action potential, the K+ will flow out, short-circuiting the attempt.

What happens during the refractory period?

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.