A Friend Receives the Results of a Urine Test and Finds

Multiple Choice

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