Which option lists the kidney function indicators Cr, BUN, BFR?

• A. Cr, BUN, BFR
• B. ALT, AST, ALP
• C. CBC, Platelets, WBC
• D. Sodium, Potassium, Chloride

Answer: (A)

Kidney function is assessed by markers that show waste removal and filtration efficiency. Creatinine is a waste product from muscle metabolism that the kidneys normally clear; when filtration declines, creatinine rises. BUN, or blood urea nitrogen, comes from protein breakdown and is filtered by the kidneys; elevated BUN suggests reduced filtration but can also be influenced by dehydration or high protein intake. The filtration rate reflects how much blood the kidneys are able to filter per minute, directly indicating overall kidney function. Using these three together gives a clear picture of renal health. The other options point to liver enzymes, general blood counts, or electrolytes, which are not direct measures of kidney filtration in the same way Cr, BUN, and a filtration rate are.