title: Active secretion of calcium, sodium and chloride by adult rat duodenum in vitro.
abstract: Active secretion of Ca2+ is observed from the serosal to the mucosal surface across adult rat duodenum in vitro when absorptive Ca2+ flux is saturated by a high [Ca2+]. Sodium and chloride are spontaneously secreted by this tissue with Cl secretion apparently accounting for about one-third of the short-circuit current when there is no absorptive co-transport of Na+.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism*; D002712:Chlorides / Q000378:metabolism*; D004386:Duodenum / Q000378:metabolism*; D066298:In Vitro Techniques; D007413:Intestinal Mucosa; D008297:Male; D011199:Potentiometry; D051381:Rats; D012704:Serous Membrane / Q000378:metabolism; D012964:Sodium / Q000378:metabolism*
chemical_list: D002712:Chlorides; D012964:Sodium; D002118:Calcium