stomach Principal cells are usually located deep in the mucous membrane layer of the gastric mucosa. Chief cells release the zymogen (enzyme precursor) pepsinogen when stimulated by a variety of factors, including cholinergic activity of the vagus nerve and the acidity of the stomach.
Then what are the 4 parathyroid glands?
The parathyroid glands are four tiny glands located in the neckthat control the body’s calcium levels. Each gland is about the size of a grain of rice (weighs about 30 milligrams and is 3-4 millimeters in diameter). The parathyroid glands produce a hormone called parathyroid hormone (PTH).
What do principal cells do?
The stomach main cell (also known as zymogen cell or peptic cell) is a cell in the stomach, which releases pepsinogen and chymosin. Pepsinogen is activated into the digestive enzyme pepsin when it comes into contact with acid produced by the gastric parietal cells.
Which cell type releases parathyroid hormone?
Like all endocrine glandsthe parathyroid glands make a hormone (a small protein that is able to cause distant cells in the body to produce a specific response). Parathyroid hormone (PTH) has a very powerful effect on the cells of the bones, causing them to release their calcium into the bloodstream.