EFFECTS OF ADRENALINE AND NORADRENALINE ON THE EAR VESSEL IN COLD- AND WARM-ADAPTED RABBITS,
Abstract
Cold exposure increases the secretion of catechol amines and enhances the effect of these hormones on metabolism. Whether the sensitivity of peripheral vessels to epinephrine and norepinephrine is altered by cold exposure has not been reported. Warm-adapted and cold-adapted rabbits were studied under chloralose and urethane anesthesia. After prolonged cold exposure rabbits responded to catechol amine infusion (adrenaline and noradrenaline) with less change in heart rate during infusion and a more rapid return to control levels following infusion; with less decrease in ear temperature during infusion and a more rapid return to control levels following infusion; less increase in peripheral resistance, and less effect on compliance of the capacitance vessels (veins). (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1962
- Accession Number
- AD0419836
Entities
People
- L. D. Carlson
- N. Honda
- W. V. Judy