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Graph shows a vasodilator effect of crude extract of U. dioica (Ud.Cr), its fractions ethyl acetate (Ud.EtAc), nHexane (Ud.nHex), chloroform (Ud.Chl) and aqueous (Ud.Aq) Ud.nHex, b verapamil on high K+ (80 mM)-induced contractions in isolated rat aorta rings. Values shown are mean ± SEM (n = 6–7), *p < 0.05, **p < 0.01, and ***p < 0.001 represent the significance difference between the relaxation of intact and denuded aorta
