Rock is considered an ecosystem because based on the definition of ecosystem. A rock is happens to be in our environment which makes it part of our ecosystem. 1 person found this useful.
The parathyroid glands are four tiny glands, located in the neck, that control the body's calcium levels. Each gland is about the size of a grain of rice (weighs approximately 30 milligrams and is 3-4 millimeters in diameter). The parathyroids produce a hormone called parathyroid hormone (PTH). PTHPTH - parathyroid hormone raises the blood calcium level by: breaking down the bone (where most of the body's calcium is stored) and causing calcium release. increasing the body's ability to absorb calcium from food.
Hyperparathyroidism Overview. Hyperparathyroidism is the result of an overproduction of a hormone called parathyroid hormone (or PTH) from the parathyroid glands. The parathyroid glands are four small glands that surround the thyroid and are found in the anterior part of the lower neck.They are about the size of a pea.yperparathyroidism Overview. Hyperparathyroidism is the result of an overproduction of a hormone called parathyroid hormone (or PTH) from the parathyroid glands. The parathyroid glands are four small glands that surround the thyroid and are found in the anterior part of the lower neck. They are about the size of a pea.