Liver and Pancreas Functions · Physiology

Why is the neutralization of chyme by pancreatic bicarbonate essential for fat digestion?

  1. Acid activates bile salts
  2. Pancreatic lipase is inactivated at low pH
  3. Gastric lipase requires a pH of 8 to function
  4. Bicarbonate breaks down triglycerides directly
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Correct answer: Pancreatic lipase is inactivated at low pH

Pancreatic lipase and other enzymes have an optimal pH range that is neutral to slightly alkaline. Without bicarbonate to neutralize the acidic chyme from the stomach, these enzymes would be denatured and fat absorption would fail.

Difficulty: Medium Question 36 of 40

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