Which of these does not contribute to the cessation of the signal in a synaptic transmission?
A) Synaptic vesicles secrete neurotransmitter by exocytosis.
B) Neurotransmitter escapes from the synapse into the nearby extracellular fluid.
C) Neurotransmitters are no longer released.
D) The axon terminal reabsorbs some neurotransmitters by endocytosis.
E) Enzymes in the postsynaptic cell break down some neurotransmitters.

Question

Quizplus · Accepted Answer

Synaptic vesicles secreting neurotransmitter by exocytosis is a part of the process that initiates synaptic transmission, not a mechanism for its cessation. The other options describe mechanisms by which the signal in synaptic transmission can be terminated, such as reuptake of neurotransmitters, degradation of neurotransmitters, or cessation of their release.

Which of These Does Not Contribute to the Cessation of the Signal