Is it true that people tend to urinate more when they are out in cold weather, and if so why?

Brainyblonde

The hypothermic person will have to urinate from cold diuresis; (Cold Diuresis - A condition where the surface blood vessels constrict in response to cold. This constriction causes greater volume pressure in the bloodstream which is detected by the kidneys. The kidneys will "pull off" the excess fluid to reduce the pressure. The kidneys then excrete the fluid, causing the bladder to fill. This is one way in which the body protects the amount of heat lost at the surface) a full bladder can mean additional heat loss. Urinating will conserve some heat. http://www.blountweb.com/weather/hypothermia.htm Oct 25 06, 4:35 PM

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