What Causes Action Potentials to Be Generated

Question

What causes action potentials to be generated?
A)Ions channels are opened and positive ions diffuse out of the cell.
B)Ions channels are opened and positive ions diffuse into the cell.
C)Ions channels are opened and negative ions diffuse into the cell.

Accepted Answer

Action potentials are generated when ion channels open and positive ions, such as sodium (Na+), diffuse into the cell, leading to depolarization.