infusion of vasoactive intestinal peptide ( vip ) into the arterial blood supply of the small intestine in anesthetized rats did not alter either the perfusion pressure in the superior mesenteric artery or the active absorption of glucose from the jejunum , but did produce a large net secretion of na+ and water into the lumen of the jejunum .
C0021852
small intestine
C0022378
jejunum