Where do chief cells secrete pepsinogen?
the stomach
Cell types The gastric chief cell (also known as a zymogenic cell or peptic cell) is a cell in the stomach that releases pepsinogen and chymosin. Pepsinogen is activated into the digestive enzyme pepsin when it comes in contact with hydrochloric acid produced by gastric parietal cells.
What is the function of chief cell?
The primary function of gastric chief cells is the synthesis and release of the proenzyme pepsinogen, which subsequently, in an acid environment, is converted to the acid protease pepsin.
What do chief cells secrete quizlet?
Chief cells secrete Gastric Lipase which functions to break down fats into smaller fatty acids that can be further digested in the intestine.
What is the chief function of pepsin?
Pepsin /ˈpɛpsɪn/ is an endopeptidase that breaks down proteins into smaller peptides. It is produced in the gastric chief cells of the stomach lining and is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food.
What stomach cells secrete pepsinogen?
PEPSIN. Pepsinogen is secreted from peptic (or chief) cells in the oxyntic gland. Some pepsinogen is also secreted from mucosal cells in the gastric antrum and the duodenum. In the presence of gastric acid this proenzyme is converted into active pepsin, which itself catalyzes further conversion from pepsinogen.
What substance is produced by the chief cells?
Chief cells release the zymogen (enzyme precursor) pepsinogen when stimulated by a variety of factors including cholinergic activity from the vagus nerve and acidic condition in the stomach. Gastrin and secretin may also act as secretagogues.
What cells produce pepsin?
Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen. Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach. A low pH (1.5 to 2) activates pepsin.
Why is pepsin secreted as pepsinogen?
Pepsin enzyme is secreted by gastric glands of the stomach as inactive pepsinogen to protect the cells of these secretory glands from strong protein digesting action of the enzyme. The inactive form of the enzyme is activated by acidic pH of stomach lumen and the stomach wall is protected by mucus lining.
What are chief cells?
Chief cells are responsible for secreting pepsinogen. They have basally located nuclei and a basophilic cytoplasm with abundant rough endoplasmic reticulum and many secretory granules that contain pepsinogen. These are secreted into the lumen of the gastric gland.
Who secretes pepsinogen?
Gastric chief cells
Gastric chief cells secrete pepsin as an inactive zymogen called pepsinogen. Parietal cells within the stomach lining secrete hydrochloric acid that lowers the pH of the stomach.
What are chief cells stimulated by?
What is carboxypeptidase secreted by?
pancreatic acinar cells
Carboxypeptidases are secreted from pancreatic acinar cells as zymogens that are activated by trypsin (Chapter 452) in the intestines.
Where are carboxypeptidase produced?
the pancreas
Carboxypeptidase A is produced in the pancreas and is crucial to many processes in the human body to include digestion, post-translational modification of proteins, blood clotting, and reproduction.