Q.

Which one of the following sub-stances is normally found in urine?

A. blood proteins
B. creatinine
C. red blood cells Fir
D. white blood cells rniw
Answer» B. creatinine
Explanation: Creatinine is a chemical waste molecule that is generated from muscle metabolism. It is transported through the bloodstream to the kidneys. The kidneys filter out most of the creatinine and dispose of it in the urine. High levels of creatinine warn of possible malfunction or failure of the kidneys.
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