Contribución del bombeo de la garganta a la ventilación pulmonar en las lagartos monitor
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Published on: March 15, 2018
T Owerkowicz1, C G Farmer, J W Hicks
1Museum of Comparative Zoology, Harvard University, Cambridge, MA 02138, USA. towerkow@oeb.harvard.edu
Science (New York, N.Y.)
|June 5, 1999
Resumen
Los lagartos pueden tener una limitación respiratoria oculta durante el movimiento rápido. Los lagartos monitor usan el bombeo de garganta para superar esta restricción axial, que se revela cuando este bombeo está desactivado.
Área de la Ciencia:
- Fisiología comparativa de la fisiología.
- La biomecánica es la biomecánica.
- Los sistemas respiratorios de los vertebrados tienen
Sus antecedentes:
- Una restricción axial dependiente de la velocidad propuesta limita la ventilación pulmonar en lagartos durante la locomoción.
- Estudios anteriores sugirieron que los lagartos monitor (Varanus) carecen de esta restricción axial.
- El bombeo gular (bombeo de garganta) es un mecanismo respiratorio conocido en algunos lagartos.
Objetivo del estudio:
- Para investigar el papel de la bomba gular en la ventilación pulmonar varanida durante la locomoción.
- Para determinar si existe una restricción axial en varánidos y cómo se gestiona.
Principales métodos:
- Observación de la locomoción y los patrones respiratorios en los varánidos.
- Desactivación experimental del mecanismo de la bomba de gular de presión positiva.
- Evaluación de la eficacia de la ventilación pulmonar con y sin bombeo gular.
Principales resultados:
- Los Varanids utilizan una bomba de gular de presión positiva para ayudar a la ventilación pulmonar durante la locomoción.
- La desactivación de la bomba gular desenmascaró una restricción axial dependiente de la velocidad en las varanidas.
- El bombeo de la glándula enmascara efectivamente la restricción axial bajo la locomoción normal.
Conclusiones:
- La restricción axial está presente en los varánidos, pero es compensada por el bombeo gular.
- Este hallazgo apoya la hipótesis de que otros tetrápodos con una locomoción y respiración similares también pueden poseer esta restricción.
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