Which of the Following is Not a Normal Constituent of Urine

Question

Which of the following is not a normal constituent of urine?
A) hydrogen ions
B) urea
C) large proteins
D) amino acids
E) creatinine

Accepted Answer

Large proteins are not normally found in urine because the filtration process in the kidneys only allows small molecules to pass through the glomerular filtration membrane. Large proteins are typically filtered out and reabsorbed by the body.