3443MedicalMedium
The absolute refractory period of an action potential is due to ________?
AVoltage inactivation of the Na+ channel
BDepletion of intracellular Na+
CInsufficient neurotransmitter
DInactivation of Na+ k+ ATPase
Correct answer
A. Voltage inactivation of the Na+ channel
Explanation
The correct answer is Voltage inactivation of the Na+ channel.