intestinal absorption


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Related to intestinal absorption: small intestine, Intestinal permeability

intestinal absorption

Etymology: L, intestinum, intestine, absorbare, to swallow
the passage of the products of digestion from the lumen of the small intestine into the blood and lymphatic vessels in the wall of the gut. The surface area of the intestine is greatly increased by the presence of fingerlike projections called villi, each of which contains capillaries and a lymphatic vessel, or lacteal. Most dissolved nutrients pass quickly into the capillary bed for transport through the portal circulation to the liver. Lipids enter the lymphatic channels, which eventually rejoin the venous circulation at the thoracic duct in the neck.

in·tes·ti·nal ab·sorp·tion

(in-testi-năl ab-sōrpshŭn)
Movement of nutrients from the small intestine into the blood supply.

intestinal absorption

the transfer of the products of digestion, minerals and water (also drugs) from the intestine into the blood or lymph. Food products are absorbed from the small intestine, via its lining of enterocytes (where some further digestive processes take place); hexoses from carbohydrates, and amino acids and peptides from proteins, enter surrounding blood vessels, thence in the portal vein to the liver, which removes some before they reach the general circulation. Lipids enter lymph vessels and these 'lacteals' ('milky' with fat) join other lymph vessels to reach the thoracic duct, thence to the venous blood. Some water is absorbed from the small intestine, but most from the large intestine.
References in periodicals archive ?
The influence of different concentrations of probenecid upon intestinal absorption for various constituents is shown in Figure 6.
The question addressed in this paper was whether the intake of fermented Ginkgo biloba leaves could beneficially affect the host, by selectively stimulating the growth or intestinal absorption function or cell proliferation of the small intestines, thus improving gut's functions through maintaining intestinal mucosal structure.
Intestinal absorption mechanism of phenylethanoid glycosides in Fructus Forsythiae extract using in vitro Caco-2 cell model
A negative DCAB diet (1) may increase the intestinal absorption of calcium by reducing pH in GIT, causing an increase in more soluble forms of calcium (ionized form) present, (2) may cause an alteration in acid base balance of animal, resulting in an increase of calcium availability from exchangeable calcium pool and (3) may cause the reduction in the calcium absorption by interference created by the presence of excess of cation mineral elements such as aluminum and magnesium (Tucker et al.
For example, in terms of intestinal absorption, an absorption rate difference of 5 ml/h/cm would result in a 250 ml difference in water absorption per hour over the first 50 cm of proximal small intestine.
The intestinal absorption of niacin, iron and zinc from whole-grain maize depends strongly on the methods of food preparation.
Excess calcium may also inhibit the intestinal absorption of zinc, possibly through competition for absorption sites or by acting as intestinal ligands (CASE et al.
The authors of this study tried to improve intestinal absorption of CoQ10 by modulating P-gp.
This drug reduces the intestinal absorption and, therefore, the blood cholesterol level.
Hypochlorhydria from short-term omeprazole treatment does not inhibit intestinal absorption of calcium, phosphorus, magnesium or zinc from food in humans.
EFFECTS OF INULIN-TYPE FRUCTANS CONSUMPTION ON MINERAL INTESTINAL ABSORPTION AND BALANCE IN RATS FED CONTROL AND IRON-DEFICIENT DIETS.
The seminar also allowed attendees to exchange on new research areas relating to the mechanisms of intestinal absorption of methionine sources, their role in the detoxification pathway and their antioxidant and acidification properties.