Intermediate Gastrointestinal Tract Quiz

Q1. Which three embryologic divisions are commonly used to organize the abdominal gastrointestinal tract?

• Right, middle, and left peritoneal gut
• Foregut, midgut, and hindgut
• Proximal, central, and distal mesentery
• Cervical, thoracic, and sacral gut

Q2. Which artery is the principal arterial supply to foregut derivatives in the abdomen?

• Median sacral artery
• Celiac trunk
• External iliac artery
• Inferior mesenteric artery

Q3. Which artery is the principal arterial supply to midgut derivatives?

• Internal iliac artery
• Superior mesenteric artery
• Celiac trunk
• Inferior mesenteric artery

Q4. Which artery is the principal arterial supply to hindgut derivatives?

• Renal artery
• Inferior mesenteric artery
• Superior mesenteric artery
• Celiac trunk

Q5. Which portion of the gastrointestinal tract is mostly secondarily retroperitoneal?

• Sigmoid colon
• Duodenum
• Jejunum
• Appendix

Q6. Which feature most clearly distinguishes jejunum from ileum in typical gross anatomy?

• Absence of a mesentery in all cases
• More prominent circular folds and a thicker wall
• Direct attachment to the stomach
• Presence of taeniae coli

Q7. Which structures are characteristic external features of the colon?

• Villi, plicae circulares, and Peyer patches only
• Taeniae coli, haustra, and appendices epiploicae
• Teniae of skeletal muscle and valves of Kerckring
• Rugae, gastric pits, and a pylorus

Q8. Which venous system receives most nutrient-rich blood from the abdominal gastrointestinal tract?

• Pulmonary venous system
• Vertebral venous plexus exclusively
• Azygos system exclusively
• Hepatic portal venous system

Q9. Where is the myenteric plexus located relative to the muscularis externa?

• Within the serosal mesothelium
• Between epithelium and lamina propria
• Inside the lumen
• Between the circular and longitudinal muscle layers

Q10. What is the general parasympathetic division between midgut and hindgut territories?

• Phrenic nerves for foregut and lumbar nerves for hindgut
• Vagus for the entire tract through the anal canal
• Pelvic splanchnic nerves for the entire tract
• Vagus for foregut and midgut, pelvic splanchnic nerves for hindgut