Water movement across nephron segments involved with the countercurrent multiplication system.
D000818:Animals; D001692:Biological Transport; D002463:Cell Membrane Permeability; D004058:Diffusion; D004231:Diuresis; D005374:Filtration; D006801:Humans; D007668:Kidney / Q000502:physiology*; D007671:Kidney Concentrating Ability; D007686:Kidney Tubules, Distal / Q000502:physiology; D007700:Kinetics; D008138:Loop of Henle / Q000502:physiology; D009399:Nephrons / Q000378:metabolism / Q000502:physiology*; D009994:Osmolar Concentration; D014882:Water-Electrolyte Balance