Glucose is Not Normally Excreted in the Urine Because

Question

Glucose is not normally excreted in the urine because
A) glucose cannot be filtered.
B) all filtered glucose is reabsorbed.
C) glucose is used up by the metabolizing nephron units.
D) glucose is converted to ammonia in the distal tubule and excreted as urea.

Accepted Answer

Glucose is filtered through the glomerulus but it is normally completely reabsorbed in the proximal convoluted tubule. The reabsorption is facilitated by glucose transporters present on the membrane of the tubule cells. This mechanism maintains a low concentration of glucose in the urine. Therefore, glucose is not normally excreted in the urine.