Most of the growth-promoting effects of Growth Hormone (GH) are mediated by which peripheral signaling molecule?
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Correct answer: Insulin-like Growth Factor-1
While GH has direct metabolic effects, its actions on bone and soft tissue growth are primarily mediated by IGF-1 (also known as Somatomedin C). IGF-1 is produced mainly in the liver in response to GH stimulation.
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