抄録
Concentration-action curves of acetylcholine, barium chloride, and Oxytocin were plotted and the slopes of acetylcholine and Oxytocin were n=1.0 and that of barium chloride, n=1.5. Atropine showed competitive antagonism with acetylcholine in a very low concentration (10-13 to 10-10 g./cc.), while papaverine and allied spasmolytic agents showed non-competitive antagonism with acetylcholine, barium chloride, and Oxytocin. Aspaminol, a spasmolytic agent with large degree of dissociation, showed competitive antagonism with barium chloride and it was assumed that rat uterus strip is more like intestine than trachea in behavior.
