title: A diurnal rhythm in the absorption of glucose and water by isolated rat small intestine.
abstract: 1. Glucose and water absorption by isolated small intestine from rats which have had unrestricted access to food is 50-60% higher at night than during the daytime. 2. When the feeding time is restricted to 06.00-09.00 hr G.M.T. glucose and water absorption rates in the period from 3 to 7 hr after withdrawal of food are almost as high as the rates observed at night-time in the animals with unrestricted feeding. 3. These changes in absorption rates appear to be associated with feeding time and not with the pattern of illumination.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D005247:Feeding Behavior; D005947:Glucose / Q000378:metabolism*; D066298:In Vitro Techniques; D007408:Intestinal Absorption; D007421:Intestine, Small / Q000378:metabolism*; D008027:Light; D051381:Rats; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water; D005947:Glucose