When sodium channels open during an action potential, the opening is caused by
A) binding of sodium ions.
B) binding of potassium ions.
C) presence of calcium.
D) presence of positive charge.

Question

Quizplus · Accepted Answer

The opening of sodium channels during an action potential is primarily triggered by the presence of a positive charge. This process, known as voltage gating, involves the channels opening in response to a change in the electrical potential across the cell membrane, allowing sodium ions to flow into the cell and further depolarize it.

When Sodium Channels Open During an Action Potential, the Opening