[Water and electrolyte movements across the duodenal mucosa in laying hens during in vivo perfusion].
The net water movements through the duodenum in laying hens are directly dependent on the applied osmotic gradient. The passive water permeability (Lp) of the mucosa is 6 times higher during absorption (mucosa to serosa: 70 microliter/h/mOsm) than in the opposite direction (secretion: 11.5 microliter/h/mOsm) and its semi permeability is 0.49 (reflexion coefficient sigma). Net sodium and potassium movements seem to be linked to net water flux. Duodenal water absorption should not be explained by a process of passive permeability.
D000818:Animals; D002645:Chickens; D004386:Duodenum / Q000378:metabolism*; D005260:Female; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000378:metabolism*; D009994:Osmolar Concentration; D010058:Oviposition; D010477:Perfusion; D014882:Water-Electrolyte Balance
Etude des mouvements d'eu et d'électrolytes à travers la muqueuse duodénale de la poule pondeuse par perfusion in vivo.