Which two mechanisms control calcium?

Updated: Oct 03, 2018
  • Author: Mahendra Agraharkar, MD, MBBS, FACP, FASN; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Answer

Calcium is controlled by 2 mechanisms. These are (1) controlling or major regulatory hormones and (2) influencing hormones. Controlling or major regulatory hormones include PTH, calcitonin, and vitamin D. The image below reviews vitamin D metabolism. In the kidney, vitamin D and PTH stimulate the activity of the epithelial calcium channel and the calcium-binding protein (ie, calbindin) to increase active transcellular calcium absorption in the distal convoluted tubule. Influencing hormones include thyroid hormones, growth hormone, and adrenal and gonadal steroids.

Vitamin D metabolism. Vitamin D metabolism.

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