The Membrane Potential That Exactly Offsets an Ion's Concentration Gradient

Question

The membrane potential that exactly offsets an ion's concentration gradient is called the
A)graded potential.
B)threshold potential.
C)equilibrium potential.
D)action potential.
E)inhibitory postsynaptic potential.

Accepted Answer

The equilibrium potential is the membrane potential at which there is no net movement of an ion across the membrane because the electrical gradient exactly balances the ion's concentration gradient. This is the point at which the ion's concentration gradient and electrical gradient are equal and opposite.