calcitonin and PTH
PTH
Calcitonin is the hormone released by the extrafollicular cells of the thyroid that causes a decrease in blood calcium levels. It does this by inhibiting the activity of osteoclasts, which are responsible for breaking down bone tissue and releasing calcium into the blood.
The parathyroid hormone stimulates the absorption of calcium from the bone.
That hormone is vitamin D.
The hormone produced by the para follicular cells of the thyroid gland is calcitonin (CT). CT can decrease the level of calcium in the blood by inhibiting the action of osteoclasts, the cells that break down bone extracellular matrix. The secretion of CT is controlled by a negative feedback system. When its blood level is high,calcitonin lowers the amount of blood calcium and phosphates by inhibiting bone resorption (breakdown of bone extracellular matrix) by osteoclasts and by accelerating uptake of calcium and phosphates into bone extracellular matrix.
Too much calcium makes the bones brittle.
Answer is Vitamin D.(1,25 bihydroxycholecalciferol. )
Parathyroid hormone (PTH) raises calcium levels in the blood when it's sensed that calcium levels are a bit lower than they ought to be. 99% of your body's calcium in the bones, so it stands to reason that PTH acts on bone to have it release calcium into the bloodstream. Indeed, this is exactly how the hormone works. A detailed mechanism for how this occurs is given in: http://en.wikipedia.org/wiki/Parathyroid_hormone Cheers.
The hormone Calcitonin has the effect of reducing blood calcium levels. The hormone comes from the thyroid gland and works in basically three ways. 1. It works to slow absorption of calcium by the intestine. 2. It also inhibits the osteoclast (cells in bone that break down old bone tissue) that raise blood calcium levels. 3. It causes osteoblast (cells in bone that lay down new bone matrix) to form new bone. This explanation is at it's simplest form of course.
The gland responsible for stimulating the deposition of calcium in the bone is the thyroid gland, which releases the hormone calcitonin. Calcitonin helps lower blood calcium levels by promoting the uptake of calcium into the bones and inhibiting osteoclast activity, which breaks down bone. This process is essential for maintaining calcium homeostasis in the body and ensuring proper bone health.
The hormone that helps remove calcium from the blood and store it in bone is calcitonin. It works by inhibiting the activity of osteoclasts, the cells responsible for breaking down bone tissue and releasing calcium into the blood. By promoting bone mineralization, calcitonin helps regulate calcium levels in the blood.
Calcitonin works with the hormone parathyroid hormone (PTH) to regulate calcium levels in the blood and tissues. Calcitonin helps reduce blood calcium levels by inhibiting bone breakdown and promoting calcium excretion by the kidneys. PTH, on the other hand, works to increase blood calcium levels by stimulating bone breakdown and enhancing calcium reabsorption by the kidneys.