Which of the following is/are true of the absolute refractory period?

Physiology Test Question

	(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.
	(C) The absolute refractory period takes about 5 ms.
	(D) The absolute refractory period precedes the relative refractory period.
	(E) The absolute refractory period sets the upper limit for the maximum frequency of action potentials generated.

Checking your answer...