Advanced Intestinal Arteries Quiz

Q1. Why can the pattern of mesenteric arcades help a surgeon estimate whether a small-bowel segment is jejunal or ileal?

• The jejunum and ileum have characteristic differences in arcades and vasa recta
• Only the jejunum has arteries
• Only the ileum has a mesentery
• The ileum is supplied by the inferior mesenteric artery

Q2. Which change generally occurs in the arterial architecture when moving from proximal jejunum toward distal ileum?

• All vessels become direct aortic branches
• Arcades disappear while vasa recta lengthen indefinitely
• Arcades increase while vasa recta shorten
• The arterial supply changes to the celiac trunk

Q3. Why is preservation of mesenteric arterial inflow important during small-bowel resection?

• Only venous drainage determines viability
• The small bowel survives without arterial blood
• Bowel viability depends on adequate retained arterial perfusion
• Mesenteric arteries carry only lymph

Q4. Which route best describes arterial blood flow from the abdominal aorta to the jejunal wall?

• Aorta, IMA, left colic, vasa recta
• Aorta, celiac trunk, splenic artery, vasa recta
• Aorta, SMA, jejunal arteries, arcades, vasa recta
• Aorta, renal artery, gonadal artery, vasa recta

Q5. What is the most important direct arterial connection near the terminal ileum?

• Anastomosis between terminal ileal branches and the ileal branch of the ileocolic artery
• Anastomosis between the left gastric and splenic arteries
• Connection between the renal and gonadal arteries
• Connection between the superior rectal and inferior rectal arteries

Q6. Why does occlusion of a single proximal intestinal branch not always infarct its entire expected bowel territory?

• The portal vein supplies arterial blood
• The bowel receives oxygen directly from the peritoneal cavity
• All intestinal arteries are paired branches of the aorta
• Adjacent arterial arcades can provide collateral flow

Q7. Which anatomical feature makes distal ileal arterial supply appear more network-like than proximal jejunal supply?

• Multiple tiers of arterial arcades
• Absence of anastomoses
• A single unbranched vasa recta
• Direct supply from the inferior mesenteric artery

Q8. During mesenteric surgery, injury to vasa recta most directly threatens which tissue?

• The adjacent small-intestinal wall
• The gallbladder
• The spleen
• The left kidney

Q9. Which statement best explains why the intestinal arteries are classified as visceral branches of the superior mesenteric artery?

• They supply only vertebral muscles
• They are branches of the internal iliac artery
• They supply visceral organs of the gastrointestinal tract
• They supply only the diaphragm

Q10. Which observation would most strongly favor ileum rather than jejunum when examining an isolated mesenteric specimen?

• Absence of mesenteric vessels
• Few arcades with long vasa recta
• Numerous arcades with relatively short vasa recta
• Direct origin of every vessel from the aorta