He kidney's ability to concentrate urine depends on the maintenance of an osmolarity gradient between the interstitial fluid of two structures: the cortex and the
The ability of the kidneys to
concentrate urine is dependent on the maintenance of an osmolarity gradient
between the interstitial fluid of the cortex and the medulla. Renal concentrating
ability can be measured in the laboratory by assessing the specific gravity of
the urine produced.
