Figure 3From: Studies on antidiarrhoeal, antispasmodic and bronchodilator activities of Operculina turpethum Linn Concentration-response curves showing the inhibitory effect of the crude extract of O. turpethum black variety (OTB) (A), hexane fraction (OTB.Hex) (B), ethyl acetate fraction (OTB.EtOAc) (C) and verapamil (D) on carbachol (1 μM)- and high K + -induced contractions in isolated on guinea-pig tracheal preparations. The symbols represent mean ± S.E.M, n = 4.Back to article page