Fig. 1. Serum levels of free triodothyronine (FT3) and thyroxine
(FT4) in control (C), cold-exposed (CE), and T3-treated
(HT3) or T3-treated (HT4) rats. Values are
means ± s.e.m. of eight different experiments. *Significant vs
C rats;
significant vs CE rats;
significant vs HT3 rats. The level of
significance was chosen as P<0.05.