If you are looking for the one hormone that does this, then the answer is parathyroid hormone (PTH), produced in the parathyroid glands.
A more technical description is given below:
Three hormones act in the body to increase blood calcium levels to normal. These hormones are 1,25-Dihydroxycholecalciferol, parathyroid hormone (PTH), and calcitonin that originate respectively from the liver and kidneys, parathyroid glands, and thyroid glands. The first, 1,25-Dihydroxycholecalciferol (active vitamin D3), serves to increase calcium absorption from the intestine. The second, PTH, dissolves bone into the blood. The third, calcitonin, prevents the bone-derived calcium from being resorbed ("reabsorbed") into the bone from which it came via PTH. To summarize, these three hormones act in concert to raise calcium levels via external and internal routes.
References: Ganong's Review of Medical Physiology, 23eKim E. Barrett, et. al. Chapter 23: Hormonal Control of Calcium & Phosphate Metabolism & the Physiology of Bone
Parathyroid hormone (PTH) and calcitonin are antagonistic hormones that regulate blood calcium ion levels. PTH increases blood calcium levels by promoting calcium release from bone and absorption from the intestines, while calcitonin decreases blood calcium levels by inhibiting bone resorption.
Parathyroid hormone (PTH) and calcitonin are the main hormones that regulate blood calcium levels. PTH increases blood calcium levels by promoting calcium release from bones and enhancing absorption from the intestines, while calcitonin works to lower blood calcium levels by aiding calcium deposition in bones.
Parathyroid hormone (PTH) and calcitonin are the hormones that control calcium levels in the body. PTH increases blood calcium levels by stimulating the release of calcium from bones and enhancing calcium reabsorption in the kidneys. Calcitonin helps to lower blood calcium levels by inhibiting bone resorption.
Parathyroid glands secrete PTH (parathyroid hormone) to regulate blood calcium levels.
Calcitonin - Thyroid Gland
parathyroid hormone/calcitonin
The parathyroid glands consist of 4 small glands that are located within the thyroid gland. They produce a hormone called Parathyroid Hormone (PTH). PTH and calcitonin together maintain the homeostasis of Ca++ in the blood. Calcitonin hormone is produced by the thyroid. Together, these two hormones keep the calcium levels in the blood within normal ranges. It reduces the calcium level while its' partner increases the level.
The hormone calcitonin acts to reduce blood calcium
The gland responsible for producing a hormone that increases the level of calcium ions in the blood is the parathyroid gland. The hormone produced is called parathyroid hormone (PTH), which helps regulate calcium levels in the body by increasing calcium absorption from the intestines and releasing it from bones.
Parathyroid hormone (PTH) and calcitonin are the two main hormones that regulate calcium balance between bone and blood. PTH increases blood calcium levels by stimulating bone resorption and increasing calcium reabsorption in the kidney, while calcitonin decreases blood calcium levels by inhibiting bone resorption.
Parathyroid hormone (PTH) and calcitonin are two hormones that help regulate calcium levels in the blood. PTH increases calcium levels by promoting calcium release from bone, while calcitonin decreases calcium levels by enhancing its storage in bone tissue. This delicate balance is important for nerve function, muscle contraction, and bone health.
Parathyroid hormone (PTH) is the hormone that activates vitamin D in response to low blood calcium levels. This activation of vitamin D helps to increase calcium absorption in the intestines and maintain normal calcium levels in the blood.