Excretory Products and their EliminationHard

Question

Under normal condition which one is completely reabsorded in the renal tubule ?

Options

A.Urea
B.Uric acid
C.Salts
D.Glucose

Solution

Glucose is high threshold substance, ie it is totally or mostly reabsorbed from the nephric filtrate in the blood capillaries.
Renal threshold, ie, upper limit of kidney to reabsorb such high threshold substances of kidney for reabsorption of glucose is about 180 mg/100 mL of nephric filtrate. When blood sugar level reaches beyond this, sugar also appears in urine.

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