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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
05/11/1996 |
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Data da última atualização: |
03/04/2017 |
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Autoria: |
HICKS, J. W.; WOOD, S. C. |
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Título: |
Temperature regulation in lizards: effects of hypoxia. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
American Journal of Physiology, v.248-B, p.R595-R600, 1985. |
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Idioma: |
Inglês |
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Conteúdo: |
Temperature regulation during external (lowered lung PO2) and internal hypoxia (anemia) was examined in four species of lizards. Exposure to a hypoxic gas mixture in a thermogradient resulted in the animal lowering their selected (preferred) body temperature. A 50% reduction in the O2 carrying capacity of the blood also reduced the selected body temperature. Lizards "shuttle" when forced to select a temperature either above or below their normal selected temperature. Exposure to hypoxia decreases the upper and lower exit temperatures during shuttling. Furthermore, a decrease in the inspired O2 cauises the rate of heating to no longer exceeed the rate of cooling as in normal. The behavioral reduction of body temperature and the altered neural and physiological aspects of temperature regulation appear to be generalized responses to impaired O2 transport and not PO2 per se. The reduced body temperature, by lowering metabolic demand, provides an effective, even life-saving, adaptation to hypoxia. |
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Palavras-Chave: |
Lizard; Reptile. |
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Thesagro: |
Anemia; Lagarto; Réptil; Temperatura do Corpo. |
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Thesaurus Nal: |
body temperature. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01559naa a2200217 a 4500
001 1789885
005 2017-04-03
008 1985 bl --- 0-- u #d
100 1 $aHICKS, J. W.
245 $aTemperature regulation in lizards$beffects of hypoxia.
260 $c1985
520 $aTemperature regulation during external (lowered lung PO2) and internal hypoxia (anemia) was examined in four species of lizards. Exposure to a hypoxic gas mixture in a thermogradient resulted in the animal lowering their selected (preferred) body temperature. A 50% reduction in the O2 carrying capacity of the blood also reduced the selected body temperature. Lizards "shuttle" when forced to select a temperature either above or below their normal selected temperature. Exposure to hypoxia decreases the upper and lower exit temperatures during shuttling. Furthermore, a decrease in the inspired O2 cauises the rate of heating to no longer exceeed the rate of cooling as in normal. The behavioral reduction of body temperature and the altered neural and physiological aspects of temperature regulation appear to be generalized responses to impaired O2 transport and not PO2 per se. The reduced body temperature, by lowering metabolic demand, provides an effective, even life-saving, adaptation to hypoxia.
650 $abody temperature
650 $aAnemia
650 $aLagarto
650 $aRéptil
650 $aTemperatura do Corpo
653 $aLizard
653 $aReptile
700 1 $aWOOD, S. C.
773 $tAmerican Journal of Physiology$gv.248-B, p.R595-R600, 1985.
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Registro original: |
Embrapa Pantanal (CPAP) |
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| 5. |  | PEREIRA, F. de A. R.; MACEDO, M. C. M.; SILVA, A. de P.; VERZIGNASSI, J. R.; BONO, J. A. M. Composição da flora infestante em solo de cerrado sob diferentes cultivos. CONGRESSO BRASILEIRO DA CIÊNCIA DAS PLANTAS DANINHAS, 28., 2012, Campo Grande, MS. Ciências das plantas daninhas na era da biotecnologia: anais. Campo Grande, MS: SBCPD, 2012. p.774-781| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 7. | | SILVA, A. C.; MENDES, A. C.; RIBEIRO, C.; PARIS, E. C. Síntese e caracterização de nanopartículas esféricas e monodispersas de sílica. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 8, 2014, Juiz de fora. Anais... São Carlos: Embrapa Instrumentação; Campo Grande: Embrapa Gado de Corte; Juiz de Fora: Embrapa Gado de Leite, 2014. p. 473-475. Editores: Maria Alice Martins, Humberto de Mello Brandão, Marlene de Barros Coelho, Daniel Souza Corrêa, Caue Ribeiro, Luiz Henrique Capparelli Mattoso.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 7 | |
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