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Titolo:
CARDIO-VENTILATORY CONTROL IN RAINBOW-TROUT .2. REFLEX EFFECTS OF EXOGENOUS NEUROCHEMICALS
Autore:
BURLESON ML; MILSOM WK;
Indirizzi:
UNIV TEXAS,DEPT BIOL,BOX 19498 ARLINGTON TX 76019 UNIV BRITISH COLUMBIA,DEPT ZOOL VANCOUVER BC V6T 1Z4 CANADA
Titolo Testata:
Respiration physiology
fascicolo: 3, volume: 101, anno: 1995,
pagine: 289 - 299
SICI:
0034-5687(1995)101:3<289:CCIR.R>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
ONCORHYNCHUS-MYKISS; CHANNEL CATFISH; CATECHOLAMINES; RESPONSES; SEROTONIN;
Keywords:
CHEMORECEPTORS (BRANCHIAL O-2); CONTROL OF BREATHING; FISH; (RAINBOW TROUT (ONCORHYNCHUS MYKISS)); MEDIATORS; (ACETYL CHOLINE, CATECHOLAMINES, SEROTONIN); NEUROCHEMICALS; (O-2, CHEMORECEPTORS); PHARMACOLOGICAL AGENTS; (CYANIDE);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
25
Recensione:
Indirizzi per estratti:
Citazione:
M.L. Burleson e W.K. Milsom, "CARDIO-VENTILATORY CONTROL IN RAINBOW-TROUT .2. REFLEX EFFECTS OF EXOGENOUS NEUROCHEMICALS", Respiration physiology, 101(3), 1995, pp. 289-299

Abstract

The effects of various neurochemicals were examined in intact, unanesthetized rainbow trout (Oncorhynchus mykiss) to assess the role of branchial O-2-sensitive chemoreceptors in the cardio-ventilatory responses to exogenous neurochemicals. Cyanide stimulated ventilation and elicited bradycardia when given externally but only stimulated ventilationwhen injected internally. Norepinephrine increased heart rate, blood pressure and ventilatory rate but opercular pressure was not affected. Dopamine had no effect on either heart or ventilatory rate but increased blood pressure and decreased opercular pressure. Serotonin stimulated heart rate and ventilation but decreased blood pressure. Acetylcholine and nicotine stimulated all cardio-ventilatory variables. Muscarine decreased heart rate and blood pressure and had a biphasic effect on ventilation. These results, combined with the results from the preceding study, suggest that the cardio-ventilatory effects of exogenouslyadministered (1) cyanide are entirely mediated by gill O-2 receptors,(2) serotonin, and cholinergic drugs could be partly mediated by O-2 receptors and (3) catecholaminergic drugs are not mediated by O-2 receptors.

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Documento generato il 02/12/20 alle ore 14:42:01