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Glucose Absorption and Starch Digestion in the Intestine of the Chicken

1980; Elsevier BV; Volume: 110; Issue: 1 Linguagem: Inglês

10.1093/jn/110.1.117

1541-6100

G. Riesenfeld, D. Sklan, A. Bär, U. Eisner, S. Hurwitz,

Regulation of Appetite and Obesity

Starch digestion and glucose absorption were determined in vivo along the chick's (Gallus domesticus) intestine, using 91Y and 51Cr-EDTA as unabsorbed reference substances. About 65% of the ingested starch was digested up to the end of the duodenum, 85% up to the end of the jejunum and about 97% at the terminal ileum. A fraction of about 97% of the glucose, ingested or released from ingested starch, was absorbed. The duodenum was the major site of glucose absorption which continued at a decreased rate down the small intestine. Glucose absorption increased linearily with luminal concentration with no indication of saturation. The apparent permeability for glucose was similar for the jejunum and ileum.