Summary
In the eel, during the annual period of high metabolic activity, intravenously administered catecholamines cause both hyperventilation and a marked increase in arterialP O2. With adrenaline, hyperventilation results from a β hyperventilatory effect superimposed upon a masked α hypoventilatory effect. The increase in arterialP O2 occurs as a consequence of hyperventilation, which raises the oxygen diffusion gradient, and hemodynamic adjustments in the gills. The latter result from both α and β vasomotor effects acting together to increase blood flow through the lamellar respiratory pathways.
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Abbreviations
- A :
-
adrenaline
- IP :
-
isoprenaline
- NA :
-
noradrenaline
References
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Peyraud-Waitzenegger, M. Simultaneous modifications of ventilation and arterialP O2 by catecholamines in the eel,Anguilla anguilla L.: Participation of α and β effects. J Comp Physiol B 129, 343–354 (1979). https://doi.org/10.1007/BF00686992
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DOI: https://doi.org/10.1007/BF00686992