Role of K⁺ and Ca²⁺ Channels in the Vasodilator Effects of Plectranthus barbatus (Brazilian Boldo) in Hypertensive Rats

Figure 3

Role of K⁺ channels in the relaxant effect induced by the hydroethanolic extract of P. barbatus (HEPB). Cumulative concentrations of HEPB were added to the Phe-contracted aortic rings. Effect of HEPB in the presence of TEA 10 mM (a), TEA 1 mM (b), 4-AP (c), BaCl₂ (d), and GLB (e). when compared to the vehicle group and ^# when compared to the HEPB group.

(a)

(b)

(c)

(d)

(e)