URINARY EXCRETION OF ADRENALINE AND NORADRENALINE IN NORMAL AND COLD-ADAPTED ANIMALS

Abstract
The urinary excretion of adrenaline and noradrenaline in normal and cold-adapted rats was investigated. The level of noradrenaline was found to be 15 times higher than that of adrenaline in both normal and cold-adapted animals. A fivefold increase of these two amines was observed in animals adapted to cold. A study in adrenalectomized rats indicated that this increased excretion of adrenaline in cold-adapted animals originated from the adrenals, whereas the increase in noradrenaline would have been secreted outside these glands.