Which blood vessel carries blood toward the glomerulus in the nephron?

• A. Afferent arteriole
• B. Efferent arteriole
• C. Glomerulus
• D. Renal vein

Answer: (A)

Blood entering the filtering unit of the nephron arrives via the afferent arteriole. This vessel brings blood toward the glomerulus, where it flows into the glomerular capillaries and begins filtration. After filtration, blood exits through the efferent arteriole. The renal vein drains blood away from the kidney, and the glomerulus itself is a capillary tuft, not a vessel bringing blood in. So the path toward the glomerulus is through the afferent arteriole.