Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion

Toads of Rhinella (=Bufo) arenarum were subjected to a condition of forced submersion duringa 40-minute period, to deepen the understanding of the mechanisms involved in the control ofboth submersion and emersion. Animals previously submitted to a first control measurementseries, were then injected...

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Autores principales: Cervino, Claudio, Rodríguez, Enrique M.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
herpetología
anfibios
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/62735
http://ppct.caicyt.gov.ar/index.php/cuadherpetol/article/view/10256
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-62735
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
herpetología
anfibios
spellingShingle Ciencias Naturales
herpetología
anfibios
Cervino, Claudio
Rodríguez, Enrique M.
Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
topic_facet Ciencias Naturales
herpetología
anfibios
description Toads of Rhinella (=Bufo) arenarum were subjected to a condition of forced submersion duringa 40-minute period, to deepen the understanding of the mechanisms involved in the control ofboth submersion and emersion. Animals previously submitted to a first control measurementseries, were then injected with atropine or propranolol, or were vagotomized. In animals eitherinjected with atropine or vagotomized, a higher heart rate (HR) than in the control group wasobserved, before, during and after the forced submersion. These animals were able to decreaseHR, although in a lesser extent than controls, suggesting that other mechanisms in addition tovagal activity are also producing and maintaining bradycardia during the submersion period.In those animals injected with propranolol (a β-adrenergic blocker), a HR lower than that ofcontrols were observed only at the beginning of the submersion and during the emersion phase.The low HR caused by propranolol during emersion with buccal pumping shows the importanceof the sympathetic system in increasing HR during emersion.
format Articulo
Articulo
author Cervino, Claudio
Rodríguez, Enrique M.
author_facet Cervino, Claudio
Rodríguez, Enrique M.
author_sort Cervino, Claudio
title Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_short Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_full Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_fullStr Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_full_unstemmed Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_sort effects of vagotomy and pharmacological blocking on heart rate of the toad <i>rhinella arenarum</i> (anura: bufonidae) during forced submersion
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/62735
http://ppct.caicyt.gov.ar/index.php/cuadherpetol/article/view/10256
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