A neurotransmitter that acts in the nervous system to calm down nervous system activity is ______.

Question

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GABA (gamma-aminobutyric acid) is a neurotransmitter that inhibits or reduces nerve activity in the nervous system. It is one of the main inhibitory neurotransmitters in the central nervous system and is responsible for calming down or reducing the excitability of neurons. Acetylcholine and norepinephrine are excitatory neurotransmitters that stimulate nerve activity, while serotonin is a modulatory neurotransmitter that helps regulate mood, appetite, and sleep.

A Neurotransmitter That Acts in the Nervous System to Calm