[The significance of the thyroid status of the body in realizing the adaptive effect of cold].

Combined immobilisation and cold for 3 and 6 hrs induced depression of cardiac contractile function and functional reserve, death rate of 30 and 80 per cent resp., hypothermia, alterations in adrenal glands and spleen, gastric mucosa ulceration in euthyroid rats. The changes were more obvious in hypothyroid rats. The cold adaptation significantly reduced the changes in the euthyroid rats whereas this effect was absent in hypothyroid animals. The data obtained corroborate the significance of intact thyroid status for the cold adaptation.