The small intestine is alkaline in nature. Which organ is responsible for raising the pH of the small intestine?
1. Pancreas
2. Large intestine
3. Gallbladder
4. Liver
Correct Answer: 1
Rationale 1: The pancreas is an essential accessory digestive organ, secreting about a quart of pancreatic fluid into the duodenum each day. This fluid is alkaline (pH 7.5 to 8.8) and contains digestive enzymes to chemically break down carbohydrates, lipids, proteins, and nucleic acids.
Rationale 2: The large intestine is not responsible for raising the small intestine's pH from acid to base.
Rationale 3: The gallbladder stores bile.
Rationale 4: The liver is not responsible for raising the small intestine's pH from acid to base.
Global Rationale: The pancreas is an essential accessory digestive organ, secreting about a quart of pancreatic fluid into the duodenum each day. This fluid is alkaline (pH 7.5 to 8.8) and contains digestive enzymes to chemically break down carbohydrates, lipids, proteins, and nucleic acids. The liver and large intestine do not change the pH of the small intestine. The gallbladder's function is to store bile.
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