Action potentials are produced by the
A) opening of voltage-activated sodium channels.
B) closing of ligand-activated chloride channels.
C) closing of ligand-activated potassium channels.
D) opening of ligand-activated potassium channels.
E) closing of voltage-activated calcium channels.

Question

Quizplus · Accepted Answer

Action potentials are produced by the opening of voltage-activated sodium channels. When a neuron receives enough excitatory input to reach the threshold potential, voltage-gated sodium channels open and sodium ions rush into the cell, causing depolarization and the initiation of an action potential.

Action Potentials Are Produced by the