Answered

Which of the following statements regarding PTH (parathyroid hormone) is true?

A. PTH causes decreased uptake of [tex]\(\text{Ca}^{2+}\)[/tex] from the small intestine.
B. PTH causes decreased vitamin D formation in the kidneys.
C. PTH causes increased reabsorption of [tex]\(\text{Ca}^{2+}\)[/tex] in the kidneys.
D. PTH causes increased loss of [tex]\(\text{Ca}^{2+}\)[/tex] from the kidneys.
E. PTH causes increased [tex]\(\text{Na}^+\)[/tex] reabsorption in the kidneys.



Answer :

GinnyAnswer

Final answer:

PTH (parathyroid hormone) regulates calcium levels in the body through various mechanisms in bones, kidneys, and intestines.


Explanation:

PTH (parathyroid hormone) functions to increase blood calcium levels. It stimulates osteoclasts in the bones to release calcium, inhibits osteoblasts to reduce calcium deposition in bones, triggers increased reabsorption of calcium in the kidneys, and promotes the formation of calcitriol (active form of vitamin D) in the kidneys, enhancing dietary calcium absorption in the intestines.


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