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.

Question

Quizplus · Accepted Answer

Glucose is freely filtered by the glomerulus, but it is almost completely reabsorbed by the renal tubules back into the blood. This is because the body needs to maintain a certain level of glucose in the blood for energy production, and excreting glucose in the urine would result in energy loss. Under certain conditions such as uncontrolled diabetes, the level of glucose in the blood can exceed the reabsorption capacity of the tubules, leading to glucose excretion in the urine.

Glucose Is Not Normally Excreted in the Urine Because