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Figure 2


Fig. 2. Original tension recordings showing the effects of hypoxia (PO2<5 mmHg) on an alligator intrapulmonary artery, internal circumference 1086 µm, preconstricted with endothelin-1 (ET-1; 10–8 mol l–1). The hypoxic constriction is compared to the constriction induced by KPSS (60 mmol l–1). The degree of relaxation with acetylcholine (ACh; 10–5 mol l–1) verifies an intact endothelium; W, wash with PSS.