NEET · BiologyMedium
The pH of the stomach is highly acidic due to the secretion of hydrochloric acid. What is the primary physiological role of this acidity in digestion?
- A.Neutralizing the bile salts
- B.Activating pepsinogen into pepsin
- C.Breaking down complex carbohydrates
- D.Emulsifying dietary lipids
Show correct answer & step-by-step solution
Correct answer: B — Activating pepsinogen into pepsin
Solution
- The stomach secretes inactive pepsinogen to prevent self-digestion of gastric glands.
- Hydrochloric acid () is secreted by parietal cells.
- The low pH created by triggers the conversion of pepsinogen to pepsin.
- Pepsin then initiates protein digestion.
- Hence the answer is (B).
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