Human growth hormones (hGH) aka somatotropin is a member of the group of hormones called somatotropes. It is a single chained amino acid. Following the release of growth hormone releasing factor from the hypothalamus, it stimulates grrowth in the vast majority of tissues in the body.
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<span style="font-size: 13.28px;" />1. Khan Academy. Regulation of growth hormone. 2018. [Cited 05/12/18}; available from: https://www.khanacademy.org/test-prep/mcat/biological-sciences-practice/biological-sciences-practice-tut/e/endocrine-system---passage-1