Blood levels of total bilirubin are used primarily to evaluate the function of the:

Blood levels of total bilirubin are used primarily to evaluate the function of the:

• A. Kidneys
• B. Liver
• C. Pancreas
• D. Bile ducts

Answer: (B)

Total bilirubin in the blood mainly reflects the liver’s ability to handle bilirubin: the liver takes up unconjugated bilirubin from the blood, conjugates it so it can be water-soluble, and then excretes it into bile. If the liver isn’t working well or bile flow is blocked, bilirubin builds up, so the level rises. That’s why this test is used to evaluate liver function. The kidneys aren’t responsible for processing bilirubin, the pancreas isn’t involved in bilirubin metabolism, and while bile ducts are part of excreting bilirubin, the measurement primarily gauges hepatic processing and excretion rather than duct patency.

Total bilirubin in the blood mainly reflects the liver’s ability to handle bilirubin: the liver takes up unconjugated bilirubin from the blood, conjugates it so it can be water-soluble, and then excretes it into bile. If the liver isn’t working well or bile flow is blocked, bilirubin builds up, so the level rises. That’s why this test is used to evaluate liver function. The kidneys aren’t responsible for processing bilirubin, the pancreas isn’t involved in bilirubin metabolism, and while bile ducts are part of excreting bilirubin, the measurement primarily gauges hepatic processing and excretion rather than duct patency.