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In physiology, the renal threshold is the concentration of a substance dissolved in the blood above which the kidneys begin to remove it into the urine. Renal thresholds vary by substance – the low potency poison urea, for instance, is removed at much lower concentrations than glucose. Indeed, the most common reason for the glucose renal threshold ever being exceeded is diabetes.
Additional recommended knowledge
Renal thresholds vary by species and by physiological condition; thus an animal may have different renal thresholds while hibernating, Renal thresholds can also be altered by many drugs, and may change in characteristic ways during certain illnesses.
Taken together, the collection of a kidney's renal thresholds essentially define much of its function in renal physiology. Many tests of kidney function amount to measures of renal thresholds for various substances.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Renal_threshold". A list of authors is available in Wikipedia.|