When a membrane is in its refractory period,
A)it is not possible to generate a second action potential.
B)it is at the equilibrium potential.
C)it is above threshold.
D)all of its voltage-gated potassium channels are open.

Question

Quizplus · Accepted Answer

During the refractory period, the membrane is unable to generate another action potential because the voltage-gated sodium channels are closed, and some of the voltage-gated potassium channels are still open, which makes the membrane less excitable. This period is essential for ensuring that action potentials propagate in only one direction and for preventing excessive firing of neurons.

When a Membrane Is in Its Refractory Period