Fig. 1.
Influences of food deprivation (24 h) on initial (basal) body temperature and thermogenic capacity. Left: summary of initial body temperatures of free-feeding and food-deprived rats exposed to an ambient temperature of 30°C (warm environment) or 22°C (cool environment); this summary includes values obtained in all thermophysiological experiments. Right: effect of a thermogenic β3-receptor agonist (CL316,243; 1 mg/kg iv) on the body temperature of rats exposed to an ambient temperature of 22°C; within this experiment, initial body temperatures were 37.3 ± 0.1°C for free-feeding rats and 36.6 ± 0.3°C for food-deprived rats. The number of animals in each group is shown in parentheses. *Statistical differences between food-deprived and free-feeding rats; see text for more details about statistical results.