RF
1. a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland • Syn: releasing factor, releasing hormone • Hypernyms: factor • Hyponyms: growth hormone-releasing factor, GHRF 2. a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone • Syn: reticular formation • Hypernyms: neural network, neural net • Part Holonyms: brainstem, brain-stem, brain stem • Part Meronyms: reticular activating system, RAS
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