“…Stimulation of vascular -adrenoceptors causes vasodilatation through activation of adenylyl cyclase and plasma membrane potassium channels, which may explain the results. 38 Apparently, the priming bolus of salbutamol we infused allowed the pressure to drop acutely, but the subsequent continuous infusion did not influence the slight rise over time that occurred in both the -Agonist and the Control groups. This progressive decline of function may be because we did not replace the perfusate during the experiments.…”