9.2 Digestion

9.2 Digestion

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Question 1 of 13

1. Question
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Which of the following is an example of physical digestion?
- Protein digestion by pepsin
- Glucose absorption in the small intestine
- Cutting food with teeth
- Hydrochloric acid production
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Question 2 of 13

2. Question
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Which of the following is not physical digestion?
- Chewing food
- Peristalsis in the esophagus
- Lipid breakdown by lipase
- Stomach muscle contraction
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Question 3 of 13

3. Question
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Why is physical digestion important before chemical digestion?
- It kills bacteria in food
- It increases food temperature
- It increases surface area for enzyme action
- It absorbs water from food
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Question 4 of 13

4. Question
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What is the function of the enzyme erepsin?
- Digests proteins into polypeptides
- Digests peptides into amino acids
- Digests carbohydrates into glucose
- Digests lipids into glycerol and fatty acids
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Question 5 of 13

5. Question
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Which of the following is not a function of pepsin?
- Breaks down protein into polypeptides
- Acts in an alkaline environment
- Functions in the human stomach
- Initiates protein digestion
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Question 6 of 13

6. Question
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Which enzyme breaks down polypeptides into peptides in the small intestine?
- Amylase
- Lipase
- Trypsin
- Maltase
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Question 7 of 13

7. Question
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What is the main function of hydrochloric acid in the human stomach?
- Emulsify fats
- Neutralize acids
- Activate pepsinogen to pepsin
- Increase stomach pH
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Question 8 of 13

8. Question
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Why is hydrochloric acid necessary in the stomach?
- To neutralize pancreatic juice
- To enhance amylase action
- To kill microorganisms in food
- To absorb water
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Question 9 of 13

9. Question
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Which of the following does not occur in the acidic environment of the stomach?
- Conversion of pepsinogen to pepsin
- Activation of renin
- Starch digestion by amylase
- Breakdown of protein by pepsin
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Question 10 of 13

10. Question
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Which of the following organs produce enzymes to digest proteins?
- Mouth and liver
- Stomach and pancreas
- Small intestine and liver
- Mouth and pancreas
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Question 11 of 13

11. Question
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What is the main function of fiber in the digestive system?
- Reducing saliva production
- Stimulating bowel movement
- Digesting proteins
- Absorbing amino acids
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Question 12 of 13

12. Question
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Which of the following is where both starch and protein begin digestion together?
- Mouth
- Stomach
- Duodenum
- Esophagus
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Question 13 of 13

13. Question
0 point(s)
Why doesn\’t trypsin work in the human stomach?
- The temperature is too high
- There are too many other enzymes
- The pH is too acidic for trypsin
- Trypsin is only present in saliva
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