Fig. 1. Original recordings from one turtle (Trachemys scripta) showing
changes in the recorded variables following injection of ET-1 (120 pmol
kg-1) and ETB-agonist (150 pmol kg-1). Arrows
indicate the time of injection. Psys, systemic arterial
pressure;
LAo, left aortic
blood flow; Ppul, pulmonary arterial pressure;
LPA, left pulmonary blood
flow.