When chemical communication at a synapse is terminated by the recapture of neurotransmitter molecules by the presynaptic neuron, we refer to the process as
A) diffusion.
B) enzymatic deactivation.
C) reuptake.
D) second messaging.

Question

Quizplus · Accepted Answer

The process described in the question is the reuptake of neurotransmitter molecules by the presynaptic neuron. This is a crucial process in the termination of chemical communication at a synapse, as it allows for the recycling of neurotransmitter molecules and helps to maintain the balance of neurotransmitters in the synaptic cleft. Diffusion refers to the movement of molecules from an area of high concentration to an area of low concentration, which may play a role in the initial release of neurotransmitters into the synaptic cleft. Enzymatic deactivation involves the breakdown of neurotransmitters by enzymes in the synaptic cleft, which also helps to terminate chemical communication. Second messaging refers to the activation of secondary signaling pathways within a cell in response to the binding of neurotransmitters to receptors on the cell membrane, and is not directly related to the termination of chemical communication at a synapse.

When Chemical Communication at a Synapse Is Terminated by the Recapture