Human Growth Hormone Bodybuilding
Human growth hormone (also called somatotropin) is a protein of 191 amino acids. The GH-secreting cells are stimulated to synthesize and release GH by the intermittent arrival of growth hormone releasing hormone (GHRH) from the hypothalamus. GH promotes body growth by: binding to receptors on the surface of liver cells this stimulates them to release insulin-like growth factor-1 (IGF-1; also known as somatomedin) IGF-1 acts directly on the ends of the long bones promoting their growth
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