Multiple Choice
Which statement about calcium metabolism is true?
A) Chief cells secrete PTH when extracellular Ca2+ is high.
B) C cells secrete calcitonin when extracellular Ca2+ is low.
C) High extracellular Ca2+ stimulates C cells and inhibits chief cells.
D) Vitamin D is converted to its active form when plasma Ca2+ is high.
Correct Answer:

Verified
Correct Answer:
Verified
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