In Reuptake

Multiple Choice

In reuptake

A) an action potential reverses direction.
B) a neuropeptide breaks down into amino acids, which act as neurotransmitters.
C) a neurotransmitter that has already been released into the synaptic cleft is taken back into the synaptic knob of the presynaptic neuron or into nearby neuroglia or neurons.
D) an enzyme breaks down a neurotransmitter and then another enzyme builds it back up.