The Equilibrium Potential for an Ion Across a Membrane Is

Question

The equilibrium potential for an ion across a membrane is the
A) Potential at which the total current across a m em brane is zero
B) Electrochemical potential difference for the ion
C) Potential that stops diffusion of the ion across the membrane
D) Potential that opposes osmotic flow
E) Resting membrane potential

Accepted Answer

The equilibrium potential for an ion is the membrane potential at which the net flow of the ion across the membrane is zero, meaning it stops further diffusion of the ion due to the balance of electrical and chemical gradients.