Evidence That the Mammalian Nephron Functions as a Countercurrent Multiplier System

@article{Gottschalk1958EvidenceTT,
  title={Evidence That the Mammalian Nephron Functions as a Countercurrent Multiplier System},
  author={C. Gottschalk and M. Mylle},
  journal={Science},
  year={1958},
  volume={128},
  pages={594 - 594}
}
Fluid collected by micropuncture from the bend of the loop of Henle in the concentrating hamster kidney had the same osmotic pressure as fluid from a collecting duct at the same level, while that from the distal convolution was more dilute. This indicates that the tubular fluid is first concentrated, then diluted, before its final concentration. 
Formation of Concentrated Urine
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Distal convoluted tubule.
Renal Physiology Distal Convoluted Tubule
Micropuncture and Microperfusion
WATER BALANCE AND MAXIMUM CONCENTRATING CAPACITY IN THE PRIMITIVE RODENT, APLODONTIA RUFA.
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