+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Absorption of glucose and galactose and digestion and absorption of lactose by the preruminant calf

, : Absorption of glucose and galactose and digestion and absorption of lactose by the preruminant calf. British Journal of Nutrition 30(2): 331-344

Uptakes of glucose, galactose, glucose with galactose and lactose from the intestine were studied in preruminant calves prepared with cannulae in the proximal small intestine and in slaughtered calves. Responses in concentration of blood sugar to the presence of sugar in the small intestine were also studied. Glucose and galactose were absorbed at about the same rate when present in the intestine separately. The rate for each sugar approached a maximum with increasing sugar concentration in the lumen. When glucose and galactose were present in the intestine together, the rate of galactose absorption was greatly depressed; that of glucose was unaffected. Consequently, when calves were fed on mixtures of glucose and galactose, absorption of galactose in the proximal intestine, where the relative concentration of glucose was high, was depressed. In the more distal intestine where the glucose concentration had fallen, absorption of galactose was rapid. Both sugars were absorbed efficiently during their passage through the whole small intestine, but at different sites. Galactose appeared in the blood after galactose alone was given by conversion of some galactose into glucose always occurred. Results of experiments in which galactose-14C with glucose was infused into the duodenum of a calf suggested that under these conditions the rate of galactose absorption was depressed too such an extent that nearly all the galactose entering the blood was converted into glucose. Lactose hydrolysis occurred more rapidly than the absorption of its constituent monosaccharides. After lactose was given to the calves glucose and galactose accumulated in the lumen of the proximal small intestine. A similar accumulation occurred when lactose was infused into loops of small intestine. The rate-limiting step in the total absorption of lactose in the young calf was not, therefore, the hydrolysis stage, as reported for other mammals. The absorption of the released glucose and galactose occurred in a manner similar to that described above for mixtures of glucose and galactose.


PMID: 4746691

DOI: 10.1079/bjn19730037

Other references

Moellering, R.C.Jr, 1994: Therapeutic options for infections caused by multiply-resistant enterococci. Abstracts of the Interscience Conference on Antimicrobial Agents & Chemotherapy 34(0): 292

Freedman, D.A.; Adatto, C.P., 1968: On the precipitation of seizures in an adolescent boy. Psychosomatic Medicine 30(4): 437-447

Ault, K., 2004: Management quandary. An unusual case of STI in a teenager. Journal of Pediatric and Adolescent Gynecology 17(4): 293-295

Lim, H.S.tser, C.; Paukstelis, J., 1993: Comparisons of water mobility using 17O nuclear magnetic resonance for four sugars: glucose, maltose, maltotriose, and sucrose. Cereal chemistry 69(4): 387-390

Angelides, M.; Shirazi-Adl, A.; Shrivastava, S.C.; Ahmed, A.M., 1988: A stress compatible finite element for implant/cement interface analyses. A new finite element has been developed to enforce normal and shear stress continuity at bimaterial interface points in order to alleviate the problem of high stress discontinuity predictions by the conventional displacement finite element method....

Fujibayashi T.; Sato O.; Itoh H., 1979: Stage related cell mediated cyto toxicity with effector cell analysis and computation of cyto toxic activity of thymus derived cells and non thymus derived cells. Cell-mediated cytotoxicity (CMC) by lymphocytes from patients with oral squamous cell carcinoma, as well as from nonmalignant control donors, was tested by a microcytotoxicity assay against a cultured cell line derived from an oral squamous cell c...

Jones, S.B.; Hooda, B., 1998: Characterization of radioactive hazardous waste. Health Physics 74(6 SUPPL ): S6, June

Webster, T.A.; Goluch, E.D., 2012: Electrochemical detection of pyocyanin in nanochannels with integrated palladium hydride reference electrodes. Miniaturized and integrated components for electrochemical detection in micro- and nano-fluidic devices are of great interest as they directly yield an electrical signal and promise sensitive, label-free, real-time detection. One of the challenges...

Ly, P.N.; McCarty, J.M., 1992: Gangliography. The authors present a technique for imaging ganglions. The principal uses, techniques, and complications of gangliography are discussed. A case study is presented to illustrate the significance of using gangliography as part of the preoperative as...

Rich T., 1985: Directionality of displaying territorial sage sparrows amphispiza belli optimal paths. Animal Behaviour 33(4): 1390-1392