Which one of the following steps occurs during the absolute refractory period?
A) The neuron cannot generate an action potential.
B) Sodium channels open, releasing sodium ions into the neuron; potassium channels close.
C) Sodium and potassium channels open.
D) A nerve impulse is propagated.
E) Potassium channels open, releasing potassium ions from the neuron; sodium channels close.

Question

Quizplus · Accepted Answer

During the absolute refractory period, the neuron cannot generate an action potential no matter how strong the stimulus is. This is because the voltage-gated sodium channels are inactivated and cannot be opened, which prevents depolarization and the initiation of an action potential.

Which One of the Following Steps Occurs During the Absolute