What is the primary digestive function of the stomach?
A) To break down food using enzymes and acids
B) To transport food to the large intestine
C) To absorb nutrients
D) To filter toxins
E) To produce bile
IMAT 2026 · Question 13
Q13 - Digestion and digestive enzymes
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The correct answer is A) To break down food using enzymes and acids.
The stomach churns food with hydrochloric acid (HCl) and pepsin. The acid kills microbes and activates pepsin, which starts the digestion of proteins. The result is a semi-liquid mixture called chyme.
A) Correct: Mechanical churning plus HCl and pepsin is the stomach’s main digestive role.
B) Incorrect: The stomach empties into the small intestine (duodenum), not the large intestine.
C) Incorrect: Most nutrients are absorbed in the small intestine, through its villi. The stomach absorbs very little (water, alcohol, some drugs).
D) Incorrect: Filtering toxins is a function of the liver (and of the kidneys for blood waste).
E) Incorrect: Bile is produced by the liver and stored in the gallbladder.
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