what is parathyroid hormone
Parathyroid hormone is secreted by the parathyroid glands and is the most important regulator of calcium levels in the blood and within the bones. Alternative names for parathyroid hormone PTH; parathormone; parathyrin. Bones-Parathyroid hormone stimulates the release of calcium from large calcium stores in the bones into the bloodstream. 2  This increases bone destruction and decreases the formation of new bone.