A common feature of action potentials is that they
A)cause the membrane to hyperpolarize and then depolarize.
B)can undergo temporal and spatial summation.
C)are triggered by a depolarization that reaches the threshold.
D)move at the same speed along all axons.
E)result from the diffusion of Na+ and K+ through ligand-gated channels.

Question

Quizplus · Accepted Answer

Action potentials are triggered by a depolarization that reaches the threshold, which is typically around -55 mV in neurons. Once the threshold is reached, an action potential is generated and propagates down the axon. Other options are not true for all action potentials.

A Common Feature of Action Potentials Is That They