gastric secretion
gastric secretion Gastric juice contains the enzymes chymosin (in infants) and lipase, the inactive precursor of pepsin (pepsinogen), intrinsic factor, mucin, and hydrochloric acid. The acid is secreted by the parietal cells at a strength of 0.16 mol/L (0.5–0.6% acid); the same cells also secrete intrinsic factor, and failure of acid secretion (achlorhydria) is associated with a failure to absorb vitamin B12 because of lack of intrinsic factor (see anaemia, pernicious) and reduced absorption of iron. Gastric secretion declines with increasing age, as a result of gastric atrophy.
Pepsinogen is secreted by the chief cells of the gastric mucosa, and is activated to pepsin by either gastric acid or the action of existing pepsin; it is a proteolytic enzyme. The only function of chymosin is to coagulate milk; the lipase hydrolyses a proportion of dietary fat.
Pepsinogen is secreted by the chief cells of the gastric mucosa, and is activated to pepsin by either gastric acid or the action of existing pepsin; it is a proteolytic enzyme. The only function of chymosin is to coagulate milk; the lipase hydrolyses a proportion of dietary fat.
More From encyclopedia.com
Gastrin , gastrin is a hormone produced in the stomach which stimulates gastric acid secretion after a meal. It was discovered in 1905 by John Sydney Edkins (1… Gastric Juice , gastric juice Fluid comprising a mixture of substances, including pepsin and hydrochloric acid, secreted by glands of the stomach. Its principal func… Gastric Acid , acid, gastric The acid in the gastric secretion is hydrochloric acid; see also achlorhydria; gastric acidity.
gastric acid See gastric secretion. Achlorhydria , hypochlorhydria Partial deficiency of hydrochloric acid secretion in the gastric juice. See also achlorhydria; anaemia, pernicious.
achlorhydria Defi… Pepsin , pepsin Digestive enzyme secreted by glands of the stomach wall as part of the gastric juice. In the presence of hydrochloric acid it catalyzes the sp… Secretin , secretin A hormone produced by the anterior part of the small intestine (the duodenum and jejunum) in response to the presence of hydrochloric acid f…
You Might Also Like
NEARBY TERMS
gastric secretion