Figure 3: Cumulative concentration-response curves for ACh in NA-precontracted aortic preparations after 1 month. Relaxation response is expressed as percentage. Data are shown as means � SEM. *P < 0.05 (as compared to VD) (VC, EC, VD, and ED represent vehicletreated control, extract-treated control, vehicle-treated diabetic, and extract-treated diabetic rats, respectively)