Intestinal Juice

intestinal juice

[in′tes·tən·əl ¦jüs] (physiology) An alkaline fluid composed of the combined secretions of all intestinal glands.

Intestinal Juice

the secreta of glands of the small and large intestines; a colorless or yellowish fluid with an alkaline reaction and containing clumps of mucous and cast-off epithelial cells.

Man secretes 1–3 liters of intestinal juice a day, depending on the type of food eaten and the individual’s physical condition. Intestinal juice is secreted continuously, in response to mechanical stimulation of the mucous membrane by the intestinal content, or chyme. The density of the juice in man and animals varies from 1.007 to 1.009. Intestinal juice is composed of water and organic and inorganic substances; the solid residue (1.2–1.5 percent) is similar in composition to the cells of the cast-off epithelium. Small amounts of enzymes are found in intestinal juice: amylase, saccharase, maltase, amino peptidases, enterokinase, monoglyceride lipase, phosphatase, and nucleotidase. These enzymes are absent only in the distal portions of the large intestine.

Intestinal secretion is regulated by nervous and humoral mechanisms. The parasympathetic (cholinergic) division of the autonomic system stimulates intestinal secretion; the sympathetic (adrenergic) division inhibits it.

N. M. TIMOFEEVA

intestinal juice

juice

[jo̳s] any fluid from animal or plant tissue.gastric juice see gastric juice.intestinal juice the liquid secretion of glands in the intestinal lining.pancreatic juice the enzyme-containing secretion of the pancreas, conducted through its ducts to the duodenum.prostatic juice the liquid secretion of the prostate, which contributes to semen formation.

in·tes·ti·nal juice

an alkaline straw-colored fluid secreted by the intestinal glands; its enzymes (peptidases, saccharases, nucleases, lecithinases, phosphatases, lipases) complete the hydrolysis of carbohydrates, proteins, and lipids.

intestinal juice

A nonspecific, generic term for the sum total of intestinal secretions after the stomach, which consists of secretions from the exocrine pancreas via the ampulla of Vater. The key digestive enzyme, trypsin, is secreted in the inactive form as trypsinogen and activated by enterokinase in the intestine; trypsin in turn activates other proteases—e.g., pro-colipase, which is converted to colipase. Intestinal juice contains bile salts, digestive enzymes, mucus, hormones and high-pH secretions, which neutralise hydrochloric acid of gastric origin.

in·tes·ti·nal juice

(in-testi-năl jūs) Alkaline straw-colored fluid secreted by the intestinal glands.

intestinal juice

Intestinal Juice

intestinal juice

Intestinal Juice

intestinal juice

juice

in·tes·ti·nal juice

intestinal juice

in·tes·ti·nal juice

intestinal juice

Words related to intestinal juice

noun secretions by glands lining the walls of the intestines

Related Words