EVERYDAY SCIENCE

Detailed explanation-1: -The bones act as a storage site for calcium: The body deposits calcium in the bones when blood levels get too high, and it releases calcium when blood levels drop too low. This process is regulated by PTH, vitamin D, and calcitonin. Cells of the parathyroid gland have plasma membrane receptors for calcium.

Detailed explanation-2: -For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium, and phosphorus. These minerals, incorporated into bone tissue, can be released back into the bloodstream to maintain levels needed to support physiological processes.

Detailed explanation-3: -The parathyroid glands in the throat make parathyroid hormone, which regulates the amounts of calcium, phosphorus and magnesium in the bones and blood. Problems include overactivity (hyperparathyroidism) and underactivity (hypoparathyroidism).

Detailed explanation-4: -The Nervous system. Calcium is essential for nerve transmission, muscle contraction, and blood clotting. When calcium levels are too high or too low, the nervous system is primarily affected. When calcium levels are too low, muscles can contract abnormally and cause cramps and spasms.