interstitial transit was assessed by instilling radiochromium into the duodenum and calculating the geometric center of the distribution of marker in the small intestine . beta-endorphin and dala produced a dose-related decrease in intestinal transit when the peptides were given intracerebroventricularly ( i.c.v . ) however , neither peptide was effective when i.p .
C0021852
small intestine
C0021853
intestinal