What term describes decreased activation of brain circuits that may underlie many compulsive behaviors

Dopamine deficiency

Explanation:

dopamine is commonly known to be a monoamine neurotransmitter as it usually binds to a dopamine receptor (G-protein coupled) which usually releases a variety of downstream signals.

Dopamine works/acts by The released into synaptic cleft. Which then binds with receptor after which, dopamine is uptaken back into the cell and then control mechanism for this signaling is found in the endorphin.

dopamine helps greatly in the cardiovascular, renal, hormonal, and central nervous systems and even thought to control processes. Dopamine deficiency in the striatum or substantia nigra leads to Parkinson's-like symptoms.

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explanation: