1 Muscle twitching of one arm and Muscle symptoms (4 causes). 2  Muscle twitching of one arm and Muscle twitching in children (4 causes). 3  Muscle twitching of one arm and Muscle weakness (4 causes). 4  Muscle twitching of one arm and Musculoskeletal symptoms (4 causes).
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.arathyroid 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.
These small glands are located behind the thyroid gland in your neck. The key purpose of the parathyroid glands is to keep the calcium and phosphorus in the blood at a constant, normal level. If, for example, the blood calcium becomes low, the parathyroid gland will respond by secreting more PTH. This extra PTH then will pull calcium from the bones, correcting the low blood level.