1. 1.In rats acclimated to 23°C (RT rats) or 5°C (CA rats), core temperature (Tc), tail temperature (Tt) and oxygen consumption ( Y dotO2) were measured during exposure to a hypergravic field, 2. 2.Rats were exposed for 5.5 h to a 3 g field while ambient temperature (Ta) was varied. For the first 2 h, Ta was 25°C; then Ta was raised to 34°C for 1.5 h. During this period of warm exposure Tc increased 4°C in both RT and CA rats. Finally, Ta was returned to 25°C for 2 h, and Tc decreased toward the levels measured prior to warm exposure. 3. 3.In a second experiment at 3 g, RT ad CA rats were exposed to cold (12°C) after two hours at 25°C. During the one hour cold exposure, Tc fell 1.5°C in CA rats. After cold exposure, when ambient temperature was again 25°C, Tc of RT and CA rats returned toward the levels measured prior to the thermal disturbance. 4. 4.Rats appear to regulate their temperature, albeit at a lower level, in a 3 g field.
- cold acclimation
- core temperature
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)