Question

Reference values for urobilinogen in urine are typically in the range of:

a) 0.1-0.5 mg/dL
b) 0.6-1.2 mg/dL
c) 1.3-2.0 mg/dL
d) 2.1-3.0 mg/dL

Answer 1

The reference values for urobilinogen in urine are typically in the range of 0.1-0.5 mg/dL (option a). Urobilinogen is a breakdown product of bilirubin, which is formed during the breakdown of red blood cells in the liver.

Step-by-step explanation:

The reference values for urobilinogen in urine, which is a product of bilirubin breakdown in the intestines, usually fall within the range of:

a) 0.1-0.5 mg/dL

Urobilinogen is formed in the intestines by the breakdown of bilirubin, a waste product from the breakdown of red blood cells. It is partly eliminated through feces and urine. However, most of the urobilinogen excreted in the urine is converted into urobilin, giving urine its characteristic yellow color.

Normal levels of urobilinogen in urine typically range from 0.1 to 0.5 mg/dL. Elevated levels of urobilinogen in urine could indicate conditions such as liver disease, hemolytic disorders (increased breakdown of red blood cells), or certain medications affecting bilirubin metabolism. Conversely, low levels may occur in cases of obstructive jaundice or when the liver is unable to produce bilirubin. Laboratory reference values may slightly vary among different institutions or laboratories, but the range of 0.1-0.5 mg/dL is a common reference for normal urobilinogen levels in urine.