Which hormone is commonly referred to as PTH and regulates calcium?

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Multiple Choice

Which hormone is commonly referred to as PTH and regulates calcium?

Calcium balance in the blood is regulated by hormones, and the one commonly called PTH is parathormone, produced by the parathyroid glands. When calcium levels drop, parathormone acts in multiple ways to raise them: it stimulates bone resorption to release calcium, increases calcium reabsorption in the kidneys, and boosts production of active vitamin D (calcitriol), which enhances intestinal calcium absorption. This combination effectively raises serum calcium, which is why parathormone is the hormone referred to as PTH. The other options don’t fit because calcitonin lowers blood calcium, while insulin and glucagon regulate blood glucose rather than calcium.

Calcium balance in the blood is regulated by hormones, and the one commonly called PTH is parathormone, produced by the parathyroid glands. When calcium levels drop, parathormone acts in multiple ways to raise them: it stimulates bone resorption to release calcium, increases calcium reabsorption in the kidneys, and boosts production of active vitamin D (calcitriol), which enhances intestinal calcium absorption. This combination effectively raises serum calcium, which is why parathormone is the hormone referred to as PTH. The other options don’t fit because calcitonin lowers blood calcium, while insulin and glucagon regulate blood glucose rather than calcium.

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