Question

bio - 201 topic 2: cell physiology & tissues
practice it
what type of ion channels are responsible for the flow of ions in and out of the cell during the initiation of an action potential?
nuclear ion channels
gap junction channels
mechanically - gated ion channels
ligand - gated ion channels
voltage - gated ion channels

Explanation:

When an action potential is initiated, voltage - gated ion channels open and close in response to changes in membrane potential. Ligand - gated ion channels respond to chemical ligands, gap junction channels are for cell - to - cell communication, mechanically - gated ion channels respond to mechanical stimuli, and nuclear ion channels are not involved in action potential initiation at the cell membrane level.

Answer:

E. Voltage - gated ion channels