A patient has high blood calcium after a thyroid disorder. Which hormone normally helps lower blood calcium by promoting calcium deposition in bone?
Correct answer: A. Calcitonin
- A. Calcitonin
- B. Parathyroid hormone
- C. Aldosterone
- D. Cortisol
Explanation
Calcitonin is released by thyroid parafollicular cells and lowers blood calcium by inhibiting bone resorption. Parathyroid hormone generally raises blood calcium, while aldosterone and cortisol do not regulate calcium in this primary manner.
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About Endocrine System
The endocrine system covers hormone-producing glands including the pituitary, thyroid, parathyroids, adrenals, pancreas, pineal gland, ovaries and testes. It explains hormone classes, target-cell responses, feedback control, and the functions of hormones such as insulin, thyroxine, cortisol, growth hormone and ADH, which is often confused with a kidney-produced substance.
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