What strong acid in the stomach helps to break down food, ...

[scienceeasy]

What strong acid in the stomach helps to break down food, activates pepsinogen, and kills ingested microbes?
 
  1. Lactic acid
  2. Acetoacetic acid
  3. Carbonic acid
  4. Hydrochloric acid

Question 2

The nurse is teaching a client about the importance of enzymes to digestion. The nurse explains that digestive enzymes are secreted by the:
 
  Standard Text: Select all that apply.
  1. salivary glands.
  2. stomach.
  3. large intestine.
  4. small intestine.
  5. liver.

[gcook]

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.

[scienceeasy]

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[gcook]

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