Fig. 3.
Comparison of regional hemodynamic responses (iliac, mesenteric, and renal) mediated via three major vasoactive factors (sympathetic nerves, vasopressin, and epinephrine) triggered by selective stimulation of A1 adenosine receptors located in the NTS (microinjections of CPA, 330 pmol/50 nl). Data are means ± SE. *P < 0.05, renal vs. iliac and mesenteric vascular beds. Abbreviations are as in Fig. 2. Single-factor effects were calculated from basic experimental groups {sympathetic nerve effect (ADX + VX), vasopressin [ADX − (ADX + VX)], epinephrine [VX − (ADX + VX)]} and epinephrine released via the nonbaroreflex mechanism following SAD. These effects are compared with the combined effect of all vasoactive factors operating in intact animals and after elimination of all major vasoactive factors in the SAD + ADX group.