A friend receives the results of a urine test and finds that dissolved nutrients, such as amino acids and glucose, are present in his urine. You deduce that part of his kidney is not functioning properly. Which part is most likely malfunctioning?
A) Nephron loops
B) Proximal tubules
C) Renal medulla
D) Collecting ducts
E) Renal pelvis

Question

Quizplus · Accepted Answer

The proximal tubules in the kidneys are primarily responsible for the reabsorption of nutrients, such as amino acids and glucose, from the filtrate back into the bloodstream. If these substances are present in the urine, it suggests that the proximal tubules are not functioning properly, leading to the failure of reabsorption.

A Friend Receives the Results of a Urine Test and Finds