Thermoregulatory Salivation Proportional to Hypothalamic Temperature above Threshold in the Dog,
SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CALIF PHYSIOLOGICAL RESEARCH LAB
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Rats and other mammals produce saliva when exposed to high ambient temperatures. Saliva is produced in the rat to regulate the body temperature during environmental heat stress, with the estimated water loss due to salivation increasing continuously with temperature. Shivering and panting in the dog have been described as being activated by a proportional control with an adjustable set point. For shivering and panting, the porportionality constant, for each response appeared to be independent of ambient temperature, and the threshold temperature for each response, appeared to vary inversely with the ambient temperature, i.e., as the environmental temperature decreased the thresholds increased. The present study is a preliminary report of the threshold and proportionality constant for salivation, obtained for one dog in 15C, 25C, and 35C environments.
- Anatomy and Physiology