Answer to Question 1
Correct Answer: 4
Rationale 1: Lactic acid is a byproduct of anaerobic metabolism.
Rationale 2: Acetoacetic acid is a byproduct of starvation.
Rationale 3: Carbonic acid is part of the buffer system.
Rationale 4: Hydrochloric acid is secreted by the parietal cells of the stomach.
Global Rationale: Hydrochloric acid is secreted by the parietal cells of the stomach and helps to break down food, activates pepsinogen, and kills microbes that may have been ingested. Lactic acid is a byproduct of anaerobic metabolism. Acetoacetic acid is a byproduct of starvation and carbonic acid is part of the buffer system.
Answer to Question 2
Correct Answer: 1,2,4
Rationale 1: Digestive enzymes are secreted by the salivary glands.
Rationale 2: Digestive enzymes are secreted by the stomach.
Rationale 3: Digestive enzymes are not secreted by the large intestine.
Rationale 4: Digestive enzymes are secreted by the small intestine.
Rationale 5: Digestive enzymes are not secreted by the liver.
Global Rationale: Digestive enzymes are secreted by the salivary glands, stomach, small intestine, and pancreas. They are not secreted by the large intestine or the liver.
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