AP BIOLOGY

Detailed explanation-1: -Glucose absorption takes place in small intestinal villus cells by SGLT1, which is driven by active sodium extrusion via the basolateral Na+/K+ ATPase.

Detailed explanation-2: -Glucose is absorbed through the intestine by a transepithelial transport system initiated at the apical membrane by the cotransporter SGLT-1; intracellular glucose is then assumed to diffuse across the basolateral membrane through GLUT2.

Detailed explanation-3: -There is evidence that GIP may stimulate intestinal glucose absorption in the jejunum by increasing, at least in part, its active transport mediated by SGLT1 [87].

Detailed explanation-4: -The ileum is the part of the small intestine where most glucose absorption takes place. The ileum is the part of the small intestine which lies just before the large intestine.

Detailed explanation-5: -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.