BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Parathyroid hormone is directly involved in the bones, kidneys, and small intestine. In the bones, PTH stimulates the release of calcium in an indirect process through osteoclasts which ultimately leads to the resorption of the bones.

Detailed explanation-2: -Parathyroid hormone (PTH) induces hypercalcemia in part through increasing bone resorption mediated by osteoclasts.

Detailed explanation-3: -Parathyroid hormone (PTH) levels are mainly controlled by a feedback loop of calcium levels in your blood to your parathyroid glands. In other words, low calcium levels in your blood stimulate parathyroid hormone release, whereas high calcium levels in your blood prevent your glands from releasing parathyroid hormone.

Detailed explanation-4: -The parathyroid hormone (PTH), secreted by the parathyroid glands, is responsible for regulating blood calcium levels; it is released whenever blood calcium levels are low. PTH increases blood calcium levels by stimulating osteoclasts, which break down bone to release calcium into the blood stream.

Detailed explanation-5: -Calcitonin inhibits (blocks) the activity of osteoclasts, which are cells that break down bone. When osteoclasts break down your bone, the calcium from your bone is released into your bloodstream. Therefore, the temporary blocking of osteoclasts by calcitonin reduces the amount of calcium that enters your blood.