Similar sensitivities of pancreatic and biliary secretion to cholecystokinin plus secretin infusion

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Abstract
The differing sensitivities of the gallbladder and pancreas to graded doses of CCK have been claimed as important in normal digestive events. As both secretin and CCK are thought to be released in response to normal feeding, we have reexamined the sensitivities of the gallbladder and pancreas to graded increases of CCK with a constant secretin background. Under such conditions the increase in output of pancreatic trypsin and bile salt occurred simultaneously, the dose-response curves being almost superimposable. Thus, under conditions more closely approaching normal postcibal events, the previously described differing sensitivities of the pancreas and gallbladder were not observed.