gastric gland

 any of the branched tubules in the inner lining of the stomach that secrete gastric juice and protective mucus.

      There are three types of gastric glands, distinguished from one another by location and type of secretion. The cardiac gastric glands are located at the very beginning of the stomach; the intermediate, or true, gastric glands in the central stomach areas; and the pyloric glands in the terminal stomach portion. Both the cardiac and pyloric glands secrete mucus, which coats the stomach and protects it from self-digestion by helping to dilute acids and enzymes.

 The intermediate gastric glands produce most of the digestive substances secreted by the stomach. These glands are narrow tubules composed of three major cell types: zymogenic, parietal, and mucous neck cells. At the base of the gland are the zymogenic (chief) cells, which are thought to produce the enzymes pepsin and rennin. (Pepsin digests proteins, and rennin curdles milk.) Parietal (parietal cell), or oxyntic, cells occur throughout the length of the gland and are responsible for the production of hydrochloric acid, which is necessary to activate the other enzymes. The purpose of mucous neck cells is to secrete mucus.

      There is usually a small, constant production of gastric juices, but their secretion can be stimulated by numerous means. Tasting, smelling, or thinking of food tends to increase enzyme secretions. The production of gastric juices is limited while a person is asleep, but production resumes upon awakening. Consumed food provides additional stimulation necessary for mucus secretion. Some foods also contain chemicals that activate enzyme production. Psychological states of fear, sadness, or withdrawal may reduce gastric secretion.

* * *


Universalium. 2010.

Look at other dictionaries:

  • gastric gland — n any of various glands in the walls of the stomach that secrete gastric juice …   Medical dictionary

  • gastric gland — noun Date: 1836 any of various glands in the walls of the stomach that secrete gastric juice …   New Collegiate Dictionary

  • gastric gland — noun : any of various glands in the walls of the stomach that secrete the gastric juice …   Useful english dictionary

  • isthmus of gastric gland — the part of a gastric gland immediately adjacent to the opening into the gastric pit …   Medical dictionary

  • base of gastric gland — the main part of a gastric gland, interior to the neck …   Medical dictionary

  • neck of gastric gland — a constricted area of a gastric gland just interior to the isthmus …   Medical dictionary

  • Gastric acid — is a digestive fluid, formed in the stomach. It has a pH of 1 to 2 and is composed of hydrochloric acid (HCl) (around 0.5%, or 5000 parts per million), and large quantities of potassium chloride (KCl) and sodium chloride (NaCl). The acid plays a… …   Wikipedia

  • gland — An organized aggregation of cells functioning as a secretory or excretory organ. SYN: glandula (1) [TA]. [L. glans, acorn] accessory g. a small mass of glandular structure, detached from but lying near another and larger g., to which it is… …   Medical dictionary

  • Gastric chief cell — Chief cell H E stain of fundic gland polyp showing shortening of the gastric pits with cystic dilatation …   Wikipedia

  • Gastric mucosa — Infobox Anatomy Name = PAGENAME Latin = tunica mucosa gastris GraySubject = 247 GrayPage = 1166 Caption = Stomach Caption2 = Section of mucous membrane of human stomach, near the cardiac orifice. X 45. c. Cardiac glands. d. Their ducts. cr. Gland …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.