Most of a membrane potential is established by the passive movement of different cations into and out of a cell.

Question

Quizplus · Accepted Answer

The movement of ions across the cell membrane, especially through ion channels, plays a major role in establishing the resting membrane potential. Different cations, such as potassium, sodium, and calcium, move down their electrochemical gradients through ion channels and pumps, establishing concentration and electrical gradients across the membrane. These gradients together contribute to the membrane potential. However, active transport mechanisms, such as the sodium-potassium pump, also play a smaller but important role in maintaining the membrane potential.

Most of a Membrane Potential Is Established by the Passive