Fig. 4From: Effect of phenylephrine and endothelium on vasomotion in rat aorta involves potassium uptakeRole of the endothelium on rhythmic contractions. Representative recording of rhythmic contractions in response to PE in intact aortic rings of rat in absence (a) or presence of l-NNA (b). The rings were pre-incubated 30 min with 10−4 M l-NNA before adding 10−7 M PE. To recover rhythmic contractions, 10−8 M SNP was added to the bathBack to article page