Biology - Excretory Products and their Elimination Question with Solution | TestHub

Acute renal failure is characterized by a rapid decline in kidney function, which leads to a decrease in the glomerular filtration rate (GFR).

As a result of decreased kidney function, nitrogenous waste products that are normally excreted by the kidneys accumulate in the blood.

Creatinine is a breakdown product of muscle metabolism that is filtered out of the blood by the kidneys. When the kidneys fail to filter blood effectively, the concentration of creatinine in the serum increases.

Therefore, acute renal failure can be detected biochemically by an elevated level of serum creatinine.

Answer: Elevated level of serum creatinine.