Hormone that controls blood and bone calcium levels a hormone called parathyroid (PTH).
The ideal answer is C.
Your parathyroid glands generate PTH, also called parathormone. These four pea-sized glands are located in your neck. Calcium levels in the blood are regulated by PTH. Your bones and teeth remain healthy and strong thanks to the mineral calcium.
Your parathyroid glands produce and release parathyroid hormone (PTH), which is a hormone that works by raising the level of calcium in your blood. As a hormone and a mineral, respectively, phosphorus and vitamin D levels in your blood and bones are likewise regulated by PTH.
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