Neurons of the ventrolateral preoptic nucleus (VLPO) of the hypothalamus release _______ that promotes sleep.

Neurons of the ventrolateral preoptic nucleus (VLPO) of the hypothalamus release _______ that promotes sleep.

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Neurons of the ventrolateral preoptic nucleus (VLPO) of the hypothalamus release _______ that promotes sleep. 


A. GABA
B. acetylcholine
C. dopamine
D. histamine


Answer: GABA


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