With functional experiments in vitro, we observed PD_2 & PA_2 values of atropine & Ach, for longitudinal and circular smooth muscles in gastric fundus, body & antrum of guinea-pig.

• 采用离体功能实验,测定豚鼠胃底、体、窦部纵、环平滑肌由乙酰胆碱和阿托品引起的PD_2及PA_2。