against bethanechol , mean pa2 values were 7.06 for pirenzepine and 8.16 for atropine on gastric fundus , with slopes of schild plots close to unity for both antagonists , whereas in the case of gastric smooth muscle pa2 values were 6.52 for pirenzepine and 8.52 for atropine , with the slope of the schild plot significantly less than -1 in the case of pirenzepine .
C0017129
gastric fundus
C0038351
gastric