The directions of ions as they move into and out of the cell are determined by the
A) ability of the ions to let go of their water.
B) ion concentration gradient.
C) number of channel proteins present.
D) size and charge of the ions.
E) presence of specific stimuli to open gated channel proteins.

Question

Quizplus · Accepted Answer

The movement of ions into and out of the cell is primarily determined by the ion concentration gradient, which is the difference in ion concentration across the cell membrane.

The Directions of Ions as They Move into and Out