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.
The thyroid and parathyroid glands regulate blood calcium. When blood calcium is low, the parathyroid glands release parathyroid hormone, which breaks down bone to release calcium into the blood. When blood calcium is high, the thyroid gland releases calcitonin, which reduces the levels of calcium in the blood.Vitamin D facilitates intestinal calcium absorption, and the action of parathyroid hormone, produced by the parathyroid gland, enhances it.he thyroid is a bow-shaped gland located in front of the neck that produces the thyroid hormones thyroxine, or T4, and triiodothyronine, or T3. The thyroid gland also produces calcitonin -- a hormone that corrects high blood calcium.