Ions diffuse across membranes down their
A)chemical gradients.
B)concentration gradients.
C)electrical gradients.
D)electrochemical gradients.
E)A and B are correct.

Question

Quizplus · Accepted Answer

Ions diffuse across membranes down their electrochemical gradients, which is a combination of their chemical and electrical gradients. Chemical gradient refers to the difference in concentration of ions on either side of the membrane, while electrical gradient refers to the difference in charge across the membrane. Therefore, option D is the best choice, as it includes both factors. Options A, B, and E are partially correct, as they only consider one aspect of ion movement.

Ions Diffuse Across Membranes Down Their