[Distribution of total and hormonal iodine in rat tissues in hyperthermia]

It is found that a short-term (5 and 20 min) thermal effect (45 degrees C) induces no essential changes in the functional activity of the thyroid gland in rats. The level of total and hormonal iodine in the most important tissues is unchanged or insignificantly increased. With an increase in the thermal load time (60 min) there occurs an inhibition of the hormonogenic function of the thyroid gland which is accompanied by a pronounced decrease in the content of thyrohormones in blood and tissues. A tendency to an increase in the level of total and hormonal iodine under these conditions is observed only in kidneys.