In a basic chemistry panel, which two markers are most indicative of renal function?

• A. AST and ALT
• B. Glucose and calcium
• C. BUN and creatinine
• D. ALP and GGT

Answer: (C)

Renal function on a basic chemistry panel is assessed by waste products that the kidneys normally clear from the blood. BUN (blood urea nitrogen) reflects urea levels from protein breakdown, and creatinine is a breakdown product of muscle metabolism. Both are filtered and excreted by the kidneys, so their levels rise when kidney filtration decreases. Using them together gives a practical view of how well the kidneys are functioning. The other options relate to other organs or general metabolism: liver enzymes like AST and ALT indicate liver injury, not kidney performance; glucose and calcium are broad metabolic markers with many influences; alkaline phosphatase and GGT point to liver or bone issues, not renal clearance. So BUN and creatinine are the most indicative renal function markers in a basic panel.