Fig. 3
From: Mechanisms underlying the antihypertensive properties of Urtica dioica
a–f The response of crude extract of U. dioica (Ud.Cr), its fractions ethyl acetate (Ud.EtAc), nHexane (Ud.nHex), chloroform (Ud.Chl) and aqueous (Ud.Aq) and acetylcholine on PE-induced contractions in intact (with and without l-NAME (10 µM) pretreatment), denuded aortic rings from normotensive rats and rings from hypertensive rats. Values shown are mean ± SEM (n = 6–7), *p < 0.05, **p < 0.01, and ***p < 0.001