Kidney.

Absorption Adenosine Triphosphatases/metabolism Amino Acids/metabolism Animals Anura Biological Transport Biological Transport, Active Dogs Glomerular Filtration Rate Glucose/metabolism Humans In Vitro Techniques Kidney/enzymology,metabolism,physiology Kidney Concentrating Ability Kidney Glomerulus/metabolism Kidney Medulla/metabolism Kidney Tubules/physiology Loop of Henle/physiology Osmolar Concentration Osmotic Pressure Perfusion Permeability Potassium/metabolism Punctures Rabbits Sodium/metabolism Urea/metabolism Vasopressins/physiology

Amino Acids Vasopressins Urea Sodium Adenosine Triphosphatases Glucose Potassium