Biomaterial Database

Intestinal absorption of sugars and amino acids in the earthworm. 1977

A Berjón, and R Jordana, and F Ponz

Absorption of glucose, galactose, fructose and leucine from luminal to coelomic compartments across the intestinal wall of Scherotheca sp. seems to be a simple diffusion process and not a product of active transport or facilitated diffusion. A concentration gradient never developed from identical initial concentrations of the 14C-labelled substrates on either side of in vitro everted intestinal sacs. The rates of net passage of glucose and galactose were in linear function with the respective sugar concentration gradient. A competition between these two sugars was not observed. The diffusion rate of glucose was higher from mucosal to serosal than in reverse direction. Intestinal tissues synthesized glycogen from glucose in the medium, this process being strongly inhibited by dinitrophenol.

UI	MeSH Term	Description	Entries
D007408	Intestinal Absorption	Uptake of substances through the lining of the INTESTINES.	Absorption, Intestinal
D009835	Oligochaeta	A class of annelid worms with few setae per segment. It includes the earthworms such as Lumbricus and Eisenia.	Earthworms,Eisenia foetida,Eisenia worm,Lumbricus,Lumbricus terrestris,Eisenia fetida,Earthworm,Eisenia fetidas,Eisenia foetidas,Eisenia worms,Lumbricus terrestri,Oligochaetas,fetida, Eisenia,foetidas, Eisenia,terrestris, Lumbricus,worm, Eisenia
D010101	Oxygen Consumption	The rate at which oxygen is used by a tissue; microliters of oxygen STPD used per milligram of tissue per hour; the rate at which oxygen enters the blood from alveolar gas, equal in the steady state to the consumption of oxygen by tissue metabolism throughout the body. (Stedman, 25th ed, p346)	Consumption, Oxygen,Consumptions, Oxygen,Oxygen Consumptions
D004058	Diffusion	The tendency of a gas or solute to pass from a point of higher pressure or concentration to a point of lower pressure or concentration and to distribute itself throughout the available space. Diffusion, especially FACILITATED DIFFUSION, is a major mechanism of BIOLOGICAL TRANSPORT.	Diffusions
D000596	Amino Acids	Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.	Amino Acid,Acid, Amino,Acids, Amino
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D050260	Carbohydrate Metabolism	Cellular processes in biosynthesis (anabolism) and degradation (catabolism) of CARBOHYDRATES.	Metabolism, Carbohydrate