105k views
5 votes
What occurs during the refractory period of an action potential?

A. Hyperpolarization
B. Na+ deactivation open, Na+ and K+ activation closed
C. Na+ and K+ activation open, Na+ deactivation closed
D. Prevents backward propagation of Na+ and K+
E. Na+ activation closed, Na+ deactivation open, K+ activation open

1 Answer

3 votes

Final answer:

The refractory period of an action potential is the period immediately following the transmission of an impulse in a nerve or muscle, during which the neuron or muscle regains its ability to transmit another impulse.

Step-by-step explanation:

The refractory period of an action potential is the period immediately following the transmission of an impulse in a nerve or muscle, during which the neuron or muscle regains its ability to transmit another impulse. During this period, the membrane is in a hyperpolarized state and cannot generate another action potential.

This is because the voltage-gated sodium channels are inactivated, preventing the backward propagation of sodium ions and potassium ions. The refractory period allows the voltage-sensitive ion channels to return to their resting configurations.

User Marcos Placona
by
7.9k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.