Circulation, respiratory volumes and temperature regulation of the pigeon in dry and humid heat
| Autor: | Richard Merrill Smith |
|---|---|
| Rok vydání: | 1972 |
| Předmět: |
Male
medicine.medical_specialty Hot Temperature Blood Pressure Animal science Heart Rate Respiration medicine Animals Plethysmograph Relative humidity Lung volumes Columbidae Plethysmography Whole Body Computers Chemistry Humidity General Medicine Thermoregulation Marked effect Surgery Kinetics Blood Circulation Female Body Temperature Regulation Evaporative cooler |
| Zdroj: | Comparative Biochemistry and Physiology Part A: Physiology. 43:477-490 |
| ISSN: | 0300-9629 |
| DOI: | 10.1016/0300-9629(72)90234-4 |
| Popis: | 1. 1. In an 8 km/hr breeze pigeons survived T a s † of 54·5°C in dry air and 42·5°C at 96% r.h. 2. 2. Blood pressure remained relatively constant in the heat. 3. 3. Relative humidity had no effect on the Tb or Ta at which the f first began to increase, but thereafter as the f slowly increased r.h. had a marked effect on evaporative cooling. 4. 4. Maximal f's of 650/min with VT's of 3–4 ml produced a VE max of 2·4 1/min at a Tb of 46°C. This VE max was 23–25 times that during rest. 5. 5. The body plethysmograph, used to monitor respiration, blocked cutaneous evaporation of water which significantly hampered the pigeons' ability to thermoregulate when compared to free-standing controls. |
| Databáze: | OpenAIRE |
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