Multiple choice

Stomach has acidic medium due to

  1. secretion of mucus by gastric epithelium

  2. secretion of bile

  3. secretion of pancreatic juice

  4. secretion of HCl by gastric glands

  5. secretion of digestive enzymes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The stomach maintains an acidic pH primarily through hydrochloric acid (HCl) secretion from parietal cells in the gastric glands. This acidic environment (pH 1.5-2) is essential for activating digestive enzymes and killing ingested pathogens. Mucus secretion (option A) protects the stomach lining, while bile (B) and pancreatic juice (C) are secreted into the small intestine, not the stomach.

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