Which substance neutralizes acidic chyme as it enters the duodenum?
Correct answer: A. Pancreatic bicarbonate
- A. Pancreatic bicarbonate
- B. Gastric pepsin
- C. Bile pigment
- D. Salivary mucus
Explanation
Pancreatic bicarbonate raises the pH of acidic chyme entering the duodenum and protects the intestinal lining. Pepsin digests protein, bile pigments are waste products, and salivary mucus does not provide this main neutralizing action.
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About Digestive System
The digestive system covers the structure and functions of the alimentary canal from mouth to anus, along with the liver, gallbladder and pancreas. It explains mechanical and chemical digestion, the action of major enzymes, absorption through intestinal villi, and how digestion differs from absorption and assimilation.
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