Why is glucose, which is normally found in the glomerular filtrate, absent from the urine?
A) The kidney stores glucose as glycogen.
B) Kidney cells require glucose because energy is needed for active transport.
C) Glucose is reabsorbed back into the bloodstream.
D) Glucose is converted to amino acids in the kidney.
E) Glucose molecules are too large to pass through the loop of the nephron (loop of Henle).

Question

Quizplus · Accepted Answer

Glucose is reabsorbed back into the bloodstream by the cells lining the renal tubules. This is an important mechanism to prevent the loss of glucose, which is a needed energy source, in the urine. Only when excessively high levels of glucose are present in the blood (as in uncontrolled diabetes) is glucose found in the urine due to the kidney's inability to reabsorb all of the filtered glucose.

Why Is Glucose, Which Is Normally Found in the Glomerular