Which is a characteristic of a graded potential

Options

A. The amplitude is always the same
B. The duration varies
C. Always followed by a refractory period
D. Is an all or none response

Answer

C

Explanation

A graded potential is a small deviation from the membrane potential that makes the membrane either more polarized or less polarized. This is the period of time after an action potential begins during which an excitable cells cannot generate another action potential in response to normal threshold stimulus is called the refractory period.