Absorption mechanisms · Physiology

Zollinger-Ellison syndrome (excess gastrin) causes steatorrhea (fatty stools) primarily because:

  1. Gastrin directly inhibits the secretion of pancreatic lipase
  2. Low duodenal pH inactivates lipase and precipitates bile salts
  3. Gastrin stimulates rapid emptying of the gallbladder into the gut
  4. Excess acid destroys the intestinal GLUT5 transporters
Show answer and explanation

Correct answer: Low duodenal pH inactivates lipase and precipitates bile salts

Pancreatic lipase requires a neutral pH to function, and bile salts precipitate in acidic environments. The massive acid output in Zollinger-Ellison syndrome overwhelms the pancreatic bicarbonate, leading to fat malabsorption.

Difficulty: Medium Question 39 of 40

Practice all 40 Absorption mechanisms questions

Keep practicing

More Absorption mechanisms questions