Abstract:Abstract-In the isolated detrusor smooth muscle of the rabbit urinary bladder, acetylcholine, prostaglandin (PG) F2a, histamine and methoxamine produced dose-dependent contractions. The order of efficacy was acetylcholine>PGF2a> histamine>methoxamine.Acetylcholine and oxotremorine increased tension remarkably in the rabbit detrusor muscle; and McN-A-343 also developed tension, but with weaker sensitivity and efficacy. The contractile response to acetylcholine was competitively antagonized by atropine (pA2 9.24… Show more
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