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Body temperature regulation in the rat.

Gautier1

  • 1Atelier de Physiologie Respiratoire, Faculté de Médecine Saint-Antoine, 27 rue Chaligny, 75012, Paris, France

Journal of Thermal Biology
|April 4, 2000
PubMed
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This study investigated how rats regulate body temperature in varying environments. Results show metabolic rate and ventilation link to ambient temperature, with shivering increasing in cold and tail temperature reflecting environmental changes.

Area of Science:

  • Physiology
  • Thermoregulation
  • Animal Models

Background:

  • Understanding thermoregulation is crucial for physiological studies.
  • Rats are commonly used models for studying mammalian responses to environmental changes.

Purpose of the Study:

  • To investigate the relationship between ambient temperature and physiological responses in rats.
  • To explore how body temperature control interacts with breathing and metabolic rate.

Main Methods:

  • Adult rats were exposed to stepwise changes in ambient temperature.
  • Measurements included body and tail temperatures, metabolic rate (VO2), shivering, and ventilation (V).

Main Results:

  • Metabolic rate and ventilation exhibited a nadir at 30°C ambient temperature.

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  • Shivering initiated at 20°C and intensified with colder conditions.
  • Tail temperature mirrored ambient temperature shifts, while body temperature showed slight decreases in cold and increases in warm conditions.

    • Conclusions:

    • Body temperature control is integrated with respiratory control for efficient thermoregulation.
    • These mechanisms optimize metabolic rate during cold exposure and facilitate heat loss during warm exposure.