Renal salt and water handling in water immersion in the XXXX .

@entity1 @entity972 @entity1369 @entity1372 @entity2421 @entity17258 @entity2865 @entity1985
1. Eleven @entity1985 @entity1 were immersed up to the neck in 1.3 m of water at 34 degrees C for 4 h. 2. A diuresis began, within the first hour of, and continued throughout, immersion. The urine osmolality fell significantly and @entity2421 in the first hour of immersion and increased gradually during the remainder of immersion and postimmersion. 3. Throughout immersion there was a steady increase in urinary @entity1372 and @entity2865 excretion and a sharp fall in the postimmersion hour. 4. Overall fractional excretion of @entity1372 and of @entity2865 increased steadily throughout immersion and fell during the post-immersion hour. 5. There was an increase in urinary @entity972 excretion on immersion but no change in fractional excretion of @entity972 . There was an initial increase in distally reabsorbed @entity1372 / @entity2865 on immersion, as expressed by positive values of @entity17258 in the first hour of immersion. 6. Plasma @entity1369 levels were initially elevated in only two out of nine @entity1 . There was a significant fall in plasma @entity1369 levels on immersion, but there was no correlation between @entity1372 / @entity2865 handling and @entity1369 levels on immersion.
