Which of the following physiologic processes is a direct effect of the release of growth hormone by the anterior pituitary?
A) Development of cartilage and bone
B) Production of insulin-like growth factors (IGFs) by the liver
C) Increase in overall metabolic rate and cardiovascular function
D) Positive feedback of the hypothalamic–pituitary–thyroid feedback system
Ans: B
Feedback:
GH cannot directly produce bone growth; instead, it acts indirectly by causing the liver to produce IGFs. It affects neither metabolic rate nor the function of the hypothalamic–pituitary–thyroid feedback system.
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