Canadian Society for Medical Laboratory Science (CSMLS) Practice Exam

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Which test is typically performed to assess liver function?

Complete blood count
Liver function test
Urinalysis
PT/INR

The correct answer is: Liver function test

The liver function test is specifically designed to evaluate the health and performance of the liver. This test typically measures various enzymes, proteins, and substances that are produced by the liver, such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), alkaline phosphatase (ALP), bilirubin, and albumin. Abnormal levels of these markers can provide crucial information regarding liver conditions, such as hepatitis, cirrhosis, and liver damage, thus serving as a comprehensive assessment tool for liver function. In contrast, a complete blood count primarily evaluates overall health and detects a variety of disorders, such as infections and anemia, but it does not specifically assess liver function. Urinalysis is focused on analyzing the physical and chemical properties of urine and is more related to kidney function and metabolic processes rather than directly assessing the liver. The PT/INR test measures how long it takes for blood to clot and can provide indirect insight into liver function since the liver produces clotting factors, but it is not a comprehensive assessment of liver health like a liver function test is. Therefore, liver function tests offer a direct and thorough evaluation of the liver's ability to perform its vital processes.