An action potential
A)is strongest when neurilemma is present.
B)is an all-or-nothing event.
C)occurs when neurotransmitters enter the axon.
D)starts near the synapse.

Question

Quizplus · Accepted Answer

An action potential is an all-or-nothing event, meaning that it either happens fully or not at all. This is because the depolarization of the membrane must reach a certain threshold before the action potential can be initiated. The presence of neurilemma (also known as the myelin sheath) can actually increase the speed of conduction of the action potential, but it does not affect the strength of the action potential itself. Neurotransmitters do not enter the axon to cause an action potential; instead, they are released from the presynaptic terminal and bind to receptors on the postsynaptic membrane, initiating a separate process of synaptic transmission. Finally, an action potential starts at the initial segment of the axon, not near the synapse.

An Action Potential