Journal article
Attenuated pulmonary pressor response to hypoxia in bar-headed geese
American journal of physiology. Regulatory, integrative and comparative physiology, Vol.16(2), pp.R402-R403
1984
DOI: 10.1152/ajpregu.1984.247.2.R402
PMID: 6465351
Abstract
We determined the pulmonary pressor response during hypoxia in bar-headed geese (Anser indicus), a species that flies at altitudes up to 9,000 m, and Pekin ducks (Anas platyrhynchos), a non-flyer. Mean pulmonary arterial blood pressure (PAP) and arterial O2 partial pressure (PaO2) were measured in unanesthetized birds acutely exposed to 21, 10, 5, and, in geese only, 4% O2. PAP in geese did not change as PaO2 was reduced from 95 to 46 Torr and rose only 3 mmHg when PaO2 was reduced to 28 Torr. The same PaO2 decline in ducks (99 to 29 Torr) resulted in an 11-mmHg rise in PAP. The data suggest that very little or no increase in pulmonary vascular resistance occurs in these geese during hypoxia. This bird may provide a unique model in which to study pulmonary vascular control mechanisms.
Details
- Title: Subtitle
- Attenuated pulmonary pressor response to hypoxia in bar-headed geese
- Creators
- Frank M. Faraci - Kansas state univ., dep. anatomy physiology, Manhattan KS 66506, United StatesDelbert L Kilgore Jr - Kansas state univ., dep. anatomy physiology, Manhattan KS 66506, United StatesM. Roger Fedde - Kansas state univ., dep. anatomy physiology, Manhattan KS 66506, United States
- Resource Type
- Journal article
- Publication Details
- American journal of physiology. Regulatory, integrative and comparative physiology, Vol.16(2), pp.R402-R403
- Publisher
- American Physiological Society; Bethesda, MD
- DOI
- 10.1152/ajpregu.1984.247.2.R402
- PMID
- 6465351
- ISSN
- 0363-6119
- eISSN
- 1522-1490
- Language
- English
- Date published
- 1984
- Academic Unit
- Cardiovascular Medicine; Neuroscience and Pharmacology; Internal Medicine
- Record Identifier
- 9984040451002771
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