What is the pH of the stomach contents?

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Prepare for the Leaving Certificate Digestion Test with engaging questions and explanations. Ready yourself with multiple choice quizzes, hints, and deep insights. Be exam-ready now!

Multiple Choice

What is the pH of the stomach contents?

Explanation:
The stomach contents are kept in a highly acidic environment, which is essential for digestion. This strong acidity activates the enzyme pepsin, which starts breaking down proteins, and it also helps denature food proteins and kill many ingested microbes. The lining is protected by a mucus layer and bicarbonate to prevent damage, and acid release is tightly regulated to maintain this very acidic setting. The other options describe environments that are too close to neutral or basic, where pepsin wouldn’t be activated effectively and proteins wouldn’t be digested as efficiently.

The stomach contents are kept in a highly acidic environment, which is essential for digestion. This strong acidity activates the enzyme pepsin, which starts breaking down proteins, and it also helps denature food proteins and kill many ingested microbes. The lining is protected by a mucus layer and bicarbonate to prevent damage, and acid release is tightly regulated to maintain this very acidic setting. The other options describe environments that are too close to neutral or basic, where pepsin wouldn’t be activated effectively and proteins wouldn’t be digested as efficiently.

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