Which molecule acts as a retrograde messenger at many synapses?
A) GABA
B) Glycine
C) Serotonin
D) Substance P
E) Nitric oxide

Name: Which molecule acts as a retrograde messenger at many synapses? A) GABA B) Glycine C) Serotonin D) Substance P E) Nitric oxide
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Nitric oxide acts as a retrograde messenger in many synapses, meaning it is produced and released by the postsynaptic neuron and then travels back to the presynaptic neuron to modulate neurotransmitter release.

Which Molecule Acts as a Retrograde Messenger at Many Synapses