Advanced Body of the Stomach Quiz

Q1. Which structures form important posterior relationships of the gastric body across the lesser sac?

• Urinary bladder, prostate, and seminal vesicles
• Pancreas, left kidney, left suprarenal gland, spleen, and transverse mesocolon
• Right kidney, appendix, and cecum only
• Heart, trachea, and thyroid gland

Q2. Why can the gastric body expand substantially after a meal?

• The mucosa is permanently fixed into rigid folds
• The stomach has no smooth muscle
• Flattening of rugae and compliance of the gastric wall permit distension
• The body becomes retroperitoneal after eating

Q3. Which muscular arrangement is characteristic of the stomach wall and distinguishes it from most of the gastrointestinal tract?

• Only a single circular muscle layer
• Outer longitudinal, middle circular, and inner oblique layers
• Inner longitudinal and outer skeletal muscle only
• Three layers of skeletal muscle

Q4. Why can arteries along both curvatures maintain rich collateral supply to the gastric body?

• Extensive anastomoses connect arterial branches along both curvatures
• All gastric blood enters through one terminal artery
• The portal vein supplies arterial blood to the wall
• The stomach has no segmental arterial supply

Q5. Which statement best describes the origin of sympathetic fibers reaching the gastric body?

• The pudendal nerve supplies gastric smooth muscle
• Thoracic splanchnic fibers synapse in celiac ganglia before postganglionic fibers follow arteries to the stomach
• Pelvic splanchnic nerves provide the sympathetic supply
• Vagal fibers synapse in the sympathetic trunk

Q6. Why may visceral pain from the stomach initially be perceived in the epigastric region?

• Foregut visceral afferents project to upper thoracic spinal levels associated with the epigastrium
• All gastric sensation travels through sacral spinal nerves
• The gastric body has only somatic sensory innervation
• The stomach is supplied by the femoral nerve

Q7. Which embryologic process helps establish the adult anterior and posterior surfaces of the stomach?

• Rotation around the longitudinal axis reorients the original left and right surfaces
• Descent of the cecum creates the gastric surfaces
• Midgut rotation around the superior mesenteric artery creates the gastric surfaces
• The stomach does not rotate during development

Q8. How is the greater omentum anatomically related to the greater curvature of the gastric body?

• It forms the hepatoduodenal ligament
• It is attached along the greater curvature and descends inferiorly from it
• It attaches only to the lesser curvature
• It connects the stomach directly to the urinary bladder

Q9. Why is lymphatic drainage of the gastric body clinically complex?

• Different regions follow multiple vascular pathways toward regional nodes and ultimately celiac nodes
• The gastric body contains no lymphatic vessels
• All lymph drains only to inferior mesenteric nodes
• All gastric lymph drains directly to superficial inguinal nodes

Q10. Which statement best integrates the anatomy of the gastric body?

• It is a retroperitoneal midgut segment supplied by the superior mesenteric artery
• It is a hindgut structure supplied by pelvic splanchnic nerves
• It is an extraperitoneal organ without autonomic innervation
• It is an intraperitoneal foregut region with specialized mucosa, three muscle layers, celiac vascular and lymphatic relationships, vagal supply, and posterior relations across the lesser sac