Which of the following correctly describes the level of urea in the two blood vessels after a meal containing protein?

Renal Artery - High; Renal Vein - Low

Reason — The excess amino acids of a protein meal are deaminated in the liver to form urea. The renal artery brings this urea rich blood to the kidney, where urea is filtered out and removed in the urine. So the blood leaving the kidney through the renal vein contains much less urea.