DEVELOPMENT OF BLOOD-PRESSURE AND CARDIAC REFLEXES IN THE FROG PSEUDIS-PARADOXSUS

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dc.contributor.authorBurggren, W. W.
dc.contributor.authorBicudo, J. E.
dc.contributor.authorGlass, M. L.
dc.contributor.authorAbe, Augusto Shinya [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T15:19:40Z
dc.date.available2014-05-20T15:19:40Z
dc.date.issued1992-09-01
dc.description.abstractSystemic arterial blood pressure and heart rate (f(H)) were measured in unanesthetized, unrestrained larvae and adults of the paradoxical frog, Pseudis paradoxus from São Paulo State in Brazil. Four developmental groups were used, representing the complete transition from aquatic larvae to primarily air-breathing adults. f(H) (49-66 beats/min) was not significantly affected by development, whereas mean arterial blood pressure was strongly affected, being lowest in the stage 37-39 larvae (10 mmHg), intermediate in the stage 44-45 larvae (18 mmHg), and highest in the juveniles and adults (31 and 30 mmHg, respectively). Blood pressure was not significantly correlated with body mass, which was greatest in the youngest larvae and smallest in the juveniles. In the youngest larvae studied (stages 37-39), lung ventilation was infrequent, causing a slight decrease in arterial blood pressure but no change in heart rate. Lung ventilation was more frequent in stages 44-45 larvae and nearly continuous in juveniles and adults floating at the surface. Bradycardia during both forced and voluntary diving was observed in almost every advanced larva, juvenile, and adult but in only one of four young larvae. Developmentally related changes in blood pressure were not complete until metamorphosis, whereas diving bradycardia was present at an earlier stage.en
dc.description.affiliationUNIV ESTADUAL PAULISTA,INST BIOSCI,RIO CLARO,BRAZIL
dc.description.affiliationUNIV SAO PAULO,DEPT PHYSIOL,INST BIOSCI,BR-05421 SAO PAULO,BRAZIL
dc.description.affiliationUNIV SAO PAULO,FAC MED RIBEIRAO PRETO,DEPT PHYSIOL,BR-14049 RIBEIRAO PRETO,BRAZIL
dc.description.affiliationUnespUNIV ESTADUAL PAULISTA,INST BIOSCI,RIO CLARO,BRAZIL
dc.format.extentR602-R608
dc.identifierhttp://ajpregu.physiology.org/content/263/3/R602
dc.identifier.citationAmerican Journal of Physiology. Bethesda: Amer Physiological Soc, v. 263, n. 3, p. R602-R608, 1992.
dc.identifier.issn0002-9513
dc.identifier.lattes8776757457144680
dc.identifier.urihttp://hdl.handle.net/11449/31094
dc.identifier.wosWOS:A1992JP90200073
dc.language.isoeng
dc.publisherAmer Physiological Soc
dc.relation.ispartofAmerican Journal of Physiology
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCIRCULATIONpt
dc.subjectHEART RATEpt
dc.subjectDIVING REFLEXESpt
dc.titleDEVELOPMENT OF BLOOD-PRESSURE AND CARDIAC REFLEXES IN THE FROG PSEUDIS-PARADOXSUSen
dc.typeArtigo
dcterms.licensehttp://www.the-aps.org/mm/Publications/Info-For-Authors/Copyright
dcterms.rightsHolderAmer Physiological Soc
unesp.author.lattes8776757457144680[4]
unesp.author.orcid0000-0002-6765-8726[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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Artigos - Zoologia - IBRC