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Digestive and absorptive functions along dog small intestine comparative distributions in relation to biochemical and morphological parameters






Comparative Biochemistry & Physiology A 79(3): 463-472

Digestive and absorptive functions along dog small intestine comparative distributions in relation to biochemical and morphological parameters

The digestive (hydrolytic enzymes) and absorptive (sugar and amino acid transport) functions of dog small intestine have been evaluated in different segments and analyzed in relation to morphometric and biochemical parameters. Sugar (glucose) and amino acid (alanine and leucine) transport capacities were distributed according to specific proximo-distal gradients but passive and facilitated diffusions were not affected. Only the active, Na+-dependent component of transport was sensitive to position along the small intestine and it was postulated that this adaptation should involve variations in carrier densities. It is therefore concluded that absorbo-digestive functions are intrinsic characteristics of the brush border membrane which are regulated according to the position along the small intestine.

Accession: 005161638

PMID: 6149847

DOI: 10.1016/0300-9629(84)90547-4

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