Which is NOT an Example of a Graded Potential

Question

Which is NOT an example of a graded potential?
A)A receptor potential in a sensory receptor cell
B)A depolarizing excitatory postsynaptic potential (EPSP)
C)A hyperpolarizing inhibitory postsynaptic potential (IPSP)
D)A depolarizing pacemaker potential
E)A depolarizing action potential

Accepted Answer

Graded potentials are changes in membrane potential that vary in size and can be either hyperpolarizing or depolarizing. An action potential, on the other hand, is an all-or-nothing event that does not vary in size and is not a graded potential.