Restraint Hypothermia and I 131 Uptake by Rat Thyroid. ∗

Abstract

Summary

Thyroid I¹³¹ uptake by restrained rats was higher at one hour, and lower at 4 hours, than that of nonrestrained control animals. The lower the body temperature of the restrained animals at 4 hours, the lower the I¹³¹ uptake by the thyroid. Restrained hypothermic rats had a significantly greater thyroid uptake of I¹³¹ than equally hypothermic nonrestrained animals. It is concluded that hypothermia of restrained animals can not be ascribed to depressed basal metabolism.