Answer :
Final answer:
The pancreatic juice, produced in the pancreas, neutralizes stomach acid primarily due to its sodium bicarbonate content. This neutralization creates a suitable environment for other digestive enzymes in the small intestine.
Explanation:
The pancreatic juice that neutralises the acid content of the stomach primarily contains sodium bicarbonate. The pancreas secretes more than a liter of this juice daily, composed mostly of water, some salts, sodium bicarbonate, and various digestive enzymes. The sodium bicarbonate lends the pancreatic juice its slight alkalinity (pH 7.1 to 8.2), which buffers the acidic gastric juice in chyme, originating from the stomach. This buffering action neutralizes the stomach acid and inactivates stomach-derived pepsin, creating an optimal environment for the activity of pH-sensitive digestive enzymes in the small intestine. Such enzymes are active in the digestion of sugars, proteins, and fats.
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