Fig. 2.

Mean arterial pressure (MAP) and iliac (IVC), mesenteric (MVC), and renal (RVC) vascular conductance responses to microinjection of adenosine A₁ receptor agonist (CPA, 330 pmol/50 nl) in the subpostremal NTS in intact rats (open circles) compared with the responses evoked following different experimental procedures (filled circles). Data are means ± SE. *P < 0.05 vs. intact animals. ADX, bilateral adrenalectomy; βX, β-adrenergic blockade; VX, vasopressin V₁ receptor blockade; SAD, bilateral sinoaortic denervation; ADX + VX, bilateral adrenalectomy + vasopressin V₁ receptor blockade; SAD + ADX, bilateral sinoaortic denervation + bilateral adrenalectomy. The unstable resting level of MAP and MVC in the SAD group is the result of baroreceptor denervation; in time periods longer than 3 min, these values oscillated around the 100% level measured at time 0.