Question

which of the following correctly describes a graded potential? a) it can have amplitudes of various sizes. b) it is initiated by voltage changes in the membrane. c) it has a depolarization, repolarization, and hyperpolarization phase. d) it travels long distances.

Explanation:

Graded potentials are changes in membrane potential that vary in amplitude (size) depending on the strength of the stimulus. They are typically initiated by ligand - gated ion channels (not voltage - gated as in action potentials). Action potentials have depolarization, repolarization, and hyperpolarization phases and can travel long distances. Graded potentials are local (do not travel long distances).

Answer:

A. It can have amplitudes of various sizes.