Parathormone is produced by the parathyroid gland.
The parathyroid glands are little pea-sized glands found behind the butterfly-shaped thyroid gland in the neck.
The parathyroid glands play a crucial role in regulating calcium levels in the bloodstream.
Calcium levels in the blood plasma drop dramatically when it is deficient.
As a result, nerve cells reaching muscles induce frequent activation, resulting in muscular tetany (sustained contraction of muscles of the feet, hands, larynx, and other parts of the body).
The bones and kidneys are the primary target organs for parathyroid hormone's effects.
The hormone is released in reaction to low calcium levels in the blood, and it has the effect of raising those levels.