Effect of exposure to low temperature on normal and iron-deficient subjects.
Twenty-one Venezuelan peasants were segregated into three groups on the basis of measurements of iron status: seven normal subjects, six iron-deficient subjects with normal hemoglobin and eight iron-deficient subjects with a hemoglobin concentration of less than 9 g/dl. All subjects were placed in a water bath at an initial temperature of 36 degrees C. The water temperature was then rapidly lowered to 28 degrees C, and observations were made over the period of 1 h. Mean oral temperature of the first group fell 0.2, the second group 0.5, and the third group 0.9 degrees C. Mean plasma norepinephrine levels in both groups of iron-deficient subjects were significantly higher at 36 degrees C and during cold exposure compared with control subjects. Oxygen consumption was also significantly increased in both groups of iron-deficient subjects after cold exposure.
D000328:Adult; D001833:Body Temperature Regulation; D003080:Cold Temperature; D005260:Female; D005293:Ferritins / Q000097:blood; D006801:Humans; D000090463:Iron Deficiencies; D008297:Male; D010101:Oxygen Consumption; D014168:Transferrin / Q000097:blood
D014168:Transferrin; D005293:Ferritins