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Updated: Aug 28, 2026

Evaluation of Vascular Control Mechanisms Utilizing Video Microscopy of Isolated Resistance Arteries of Rats
Published on: December 5, 2017
Vasoconstrictory effects of adrenalin on the perfused head of the eel (Anguilla anguilla L.)
Abstract:
Adrenalin (5.0 X 10(-5) M) increases gill vascular resistance up to 23.2 +/- 6.8% in the isolated and perfused head of the european eel (Anguilla anguilla L.). This vasoactive response is nearly abolished by the alpha-adrenergic blocking agent phentolamine mesylate (5.0 X 10(-5) M), while it is increased by the beta-blocker propranolol (5.0 X 10(-4) M). From these results it may be inferred that, in our experimental conditions, the major response to the catecholamine is a vasoconstriction mediated via alpha-adrenoceptors.
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