Summary
Tritiated water (HTO) influx across isolated, perfused eel gills was investigated. This flux was unaffected by large changes in the perfusion pulse pressure and the perfusate flow rate. Adrenaline (in summer months), noradrenaline and isoprenaline produced significant (P<0.01) increases in the rate of HTO influx and reduced vascular resistance. Adrenaline, during winter months, increased vascular resistance, but still produced a rise in the rate of HTO influx. Prenalterol reduced, and phenylephrine increased vascular resistance without changing the rate of HTO influx. The promotion of influx appeared to be mediated via beta-adrenoceptors, and could be antagonised by propranolol.
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Bennett, M.B., Rankin, J.C. The effects of catecholamines on tritiated water influx and the branchial vasculature of the European eel,Anguilla anguilla L.. J Comp Physiol B 157, 327–333 (1987). https://doi.org/10.1007/BF00693359
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DOI: https://doi.org/10.1007/BF00693359