Answer :
Final answer:
Sodium bicarbonate in pancreatic juice protects the lining of the pancreatic mucosa.
Explanation:
The correct answer is B: protect the lining of the pancreatic mucosa. Sodium bicarbonate is present in pancreatic juice to help neutralize the acidic chyme that enters the small intestine from the stomach. This is important because the pancreatic enzymes that are released into the small intestine work best in a slightly alkaline environment. The bicarbonate ions produced by sodium bicarbonate reduce the acidity of the chyme, protecting the lining of the small intestine from damage.
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