Graded Potentials

Question

Graded potentials
A) produce an effect that increases with distance from the point of stimulation.
B) produce an effect that spreads actively across the membrane surface.
C) may be either a depolarization or a hyperpolarization.
D) are often all-or-none.
E) cause repolarization.

Accepted Answer

Graded potentials can either depolarize (make the cell more positive) or hyperpolarize (make the cell more negative). They are not all-or-none like action potentials. The effect of graded potentials decreases with distance from the point of stimulation and they do not actively spread across the membrane surface. They also do not cause repolarization.