[The calorigenic effect of catecholamines in rats with experimental hyper- and hypothyroidism].

RQ dynamics in rats, depending on the degree of organism's saturation with hormones, and also after catecholamine injection, was studied. Animals with a relatively mild hyperthyroidism had an increased RG as compared with control. RQ was decreased in the animals with a high degree of hyperthyroidism. Adrenaline and noradrenaline injection was accompanied by a decrease of RQ in the former case, and no changes in the latter case. Even relatively low triiodthyronin doses were shown to intensify the calorigenic catecholamine action. Reserpin injection produced no effect on the metabolic rate of hyperthyroid animals.