An action potential at one point along a neuron's membrane ends when _______.

Question

Quizplus · Accepted Answer

During an action potential, sodium channels initially open, allowing sodium ions to rush into the neuron, which causes depolarization. However, after a brief period of sodium influx, potassium channels open, allowing potassium ions to leave the neuron, which causes repolarization and ends the action potential. Choice D correctly states that an action potential ends when potassium channels open and potassium exits the neuron.

An Action Potential at One Point Along a Neuron's Membrane