Which one of the following statements about PTH is true?
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a
A fall in serum Ca2+ level inhibits its secretion
b
It inhibits the activity of osteoclasts
c
A rise in serum Ca2+ level stimulates its secretion
d
Along with TCT, it maintains calcium homeostasis
answer is D.
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Detailed Solution
Calcium homeostasis is maintained by PTH (hypercalcemic hormone) and TCT (hypocalcemic hormone). PTH stimulates the activity of osteoclasts. A fall in serum Ca2+ level stimulates the secretion of PTH. A rise in serum Ca2+ level inhibits the secretion of PTH