Abstract
The catecholamine excretion in 8 healthy subjects was investigated before and during immersion in +15 °C water for 60 min. The subjects were classified in two groups, one ‘cold-resistant’, in which the right atrial blood temperature decrease during cold exposure was less than 1.0 °C, and one ‘cold-sensitive’, in which the observed fall was 1.0 °C or more. In the ‘cold-resistant’ group cold exposure caused a marked increase in the urinary nor-adrenaline, the adrenaline excretion being statistically unaffected, while in the ‘cold-sensitive’ group the excretion of both noradrenaline and adrenaline was unchanged. It is suggested that sympathetic vasoconstriction is more important than adrenal medullary hormone secretion in the defense against hypothermia during short periods of cold exposure.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Scandinavian journal of clinical and laboratory investigation
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
