since those hormones with structural homology may have similar effects , the purpose of the present study was to examine the effect of graded doses ( 6 , 24 , and 96 nmol/kg ) of pure porcine secretin , vip , and phi on bicarbonate secretion by the proximal duodenum containing brunner 's glands .
C0013303
duodenum
C0006323
brunner 's glands