[The hydrodynamics of the superficial cortical nephrons of the rat kidney during a diuretic response].

Diuretic response to administration of mannitol, furozemide, ethaerynic acid, and euphyllinum was invariably followed by a considerable dilation of the lumen of proximal and distal tubular of the kidney surface nephrones. Simultaneously, a considerably reduced flow of the tubular fluid was always observed except after euphyllinum administration, the latter being followed by acceleration of the flow. Questions of interrelationships between the nephrone's hydrodynamic characteristics and the processes of glomerule filtration and tubular reabsorption of the fluid and electrolytes, are discussed.