Figure 4. The effect of blockade of muscarinic cholinoceptors and adrenoceptors on responses of coronary blood flow, mesenteric blood flow, renal blood flow and iliac blood flow to intra-arterial infusion of testosterone.

Testosterone was infused to achieve an intra-arterial concentration of 1 μg l⁻¹ before (▪) and after blockade of cholinoceptors and adrenoceptors (□) in 6 pigs. Each column represents the mean of absolute changes from the control and the bars their s.d. Abbreviations as in Fig. 1. With respect to before blockade: * P > 0.05, ° P > 0.15, § P > 0.35.