Core temperature is regulated, although at a lower temperature, in rats exposed to hypergravic fields

Conrad B. Monson, John M. Horowitz, Barbara A Horwitz

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)93-101
Number of pages9
JournalJournal of Thermal Biology
Volume13
Issue number3
DOIs
StatePublished - 1988

Keywords

  • cold
  • cold acclimation
  • core temperature
  • Thermoregulation

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Physiology

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