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.
By Dr Ananya Mandal, MD. Calcitonin is a hormone secreted by the thyroid gland that reduces the concentration of blood calcium level when it has risen to an above normal level.This polypeptide hormone is made up of 32 amino acids and is produced mainly by the parafollicular cells (also known as C cells) of the thyroid gland.y Dr Ananya Mandal, MD. Calcitonin is a hormone secreted by the thyroid gland that reduces the concentration of blood calcium level when it has risen to an above normal level.