The effects of adrenergic substances on pancreatic insular secretions were studied in a completely isolated canine pancreas with exclusion of the duodenum from the perfusion circuit. To ensure adequate blockade, blockers were infused before agonists. A dose range of β-receptor blockade was tested, and putative α-adrenergic effects were confirmed by combined α- and β-adrenergic receptor blockade.
Ellis Samols, Gordon C. Weir