Metabolic and heart rate responses to hypoxia in early chicken embryos in the transition from diffusive to convective gas transport

Metabolic and heart rate responses to hypoxia in early chicken embryos in the transition from diffusive to convective gas transport

Highlights ► During avian embryogenesis, the hypoxic drop in V ˙ O 2 did not cause a payment back of the O2 debt. ► At age E3, hypoxic hypometabolism was more prominent than at E5. ► The opposite was the case for heart rate (HR). ► In early embryos the O2 saving during hypometabolism can protect car...

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Veröffentlicht in:Respiratory physiology & neurobiology 2012-04, Vol.181 (2), p.109-117
Hauptverfasser: Mortola, Jacopo P, Marinescu, Daniel-Costin, Pierre, Annie, Artman, Lise
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Cardiac function
Chick Embryo
Cold Temperature
Convection
Diffusion
Embryogenesis
Heart - embryology
Heart - physiopathology
Heart Rate - physiology
Hypoxia - embryology
Hypoxia - physiopathology
Hypoxic hypometabolism
Medical Education
Myocardium - metabolism
Oxygen consumption
Oxygen Consumption - physiology
Pulmonary/Respiratory
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Zusammenfassung:Highlights ► During avian embryogenesis, the hypoxic drop in V ˙ O 2 did not cause a payment back of the O2 debt. ► At age E3, hypoxic hypometabolism was more prominent than at E5. ► The opposite was the case for heart rate (HR). ► In early embryos the O2 saving during hypometabolism can protect cardiac activity.
ISSN:1569-9048
1878-1519
DOI:10.1016/j.resp.2012.02.002