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Home  >>  JEEMAIN and AIPMT  >>  Biology  >>  Human Physiology
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Regarding parathyroid hormone (PTH) - choose the incorrect option :


( A ) The secretion of PTH is regulated by the circulating levels of calcium ions.
( B ) Parathyroid hormone (PTH) increases the Ca2+ levels in the blood.
( C ) PTH is a hypercalciuric hormone
( D ) PTH acts on bones and stimulates the process of bone resorption (dissolution/ demineralisation).
Can you answer this question?
 
 

1 Answer

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(C) is the right answer.

The parathyroid glands secrete a peptide hormone called parathyroid hormone (PTH). The secretion of PTH is regulated by the circulating levels of calcium ions. Parathyroid hormone (PTH) increases the Ca2+ levels in the blood. PTH acts on bones and stimulates the process of bone resorption (dissolution/ demineralisation). PTH also stimulates reabsorption of Ca2+ by the renal tubules and increases Ca2+ absorption from the digested food. It is, thus, clear that PTH is a hypercalcemic hormone, i.e., it increases the blood Ca2+ levels (and not hypercalciuric). Along with TCT, it plays a significant role in calcium balance in the body.
answered Apr 3, 2014 by pady_1
 
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