Question

which of the following clinical laboratory tests measures the amount of nitrogenous waste in the blood?
a blood urea nitrogen
b creatinine clearance
c urinalysis
d culture and sensitivity

Explanation:

• Blood urea nitrogen (BUN) specifically measures the amount of nitrogenous waste (urea) in the blood.
• Creatinine clearance assesses kidney function by measuring how well the kidneys filter creatinine from the blood.
• Urinalysis examines urine for various components like cells, proteins, etc., not directly the nitrogenous waste in the blood.
• Culture and sensitivity is used to identify bacteria (culture) and determine which antibiotics they are sensitive to (sensitivity), not related to nitrogenous waste in blood.

Answer:

A. blood urea nitrogen