Which of the following can regulate the skeletal system?

A. Estrogen
B. Calcitonin
C. Testosterone
D. All of the choices are correct.


Answer: D

Anatomy & Physiology

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The adrenal medulla secretes mostly ________.

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High blood glucose levels cause an increased secretion of ________.

A. erythropoietin B. calcitonin C. insulin D. glucagon E. growth hormone

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The amino acids that must be consumed in the diet are called essential. Nonessential amino acids

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In contrast to mammals, the lungs of birds are comparatively

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Anatomy & Physiology