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A diurnal rhythm in the absorption of glucose and water by isolated rat small intestine.
Author(s) -
Fisher R B,
Gardner M L
Publication year - 1976
Publication title -
the journal of physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.802
H-Index - 240
eISSN - 1469-7793
pISSN - 0022-3751
DOI - 10.1113/jphysiol.1976.sp011262
Subject(s) - absorption (acoustics) , circadian rhythm , absorption rate , rhythm , zoology , small intestine , endocrinology , period (music) , medicine , absorption of water , biology , chemistry , botany , materials science , chromatography , physics , acoustics , composite material
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.