The renal arteries are located ____ - _____ inferior to the SMA.

• A. 0.5 - 0.8
• B. 1.0 -1.5
• C. 2.0 - 2.5
• D. 3.0 - 3.5

Answer: (B)

The important idea is the relative position of the renal arteries to the superior mesenteric artery (SMA) on the abdominal aorta. The renal arteries arise from the aorta a short distance below the SMA. In practice, this distance is typically about 1.0 to 1.5 cm inferior to where the SMA branches off. This relationship is a common landmark used in ultrasound and cross-sectional imaging to locate the renal arteries, since the SMA sits higher on the aorta and serves as a reference point.

Distances that are much closer to the SMA or much farther below do not align with the usual anatomical arrangement, so a range around 1.0–1.5 cm is the best match for the normal relationship.