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Figure 1: Chick ileum (competitive antagonism of acetylcholine [ACh] by atropine [ATR]) physiological chick solution temperature: 42°C ACh: 2 μg ATR: 2 μg

Figure 1: Chick ileum (competitive antagonism of acetylcholine [ACh] by atropine [ATR]) physiological chick solution temperature: 42°C ACh: 2 μg ATR: 2 μg