Physical Digestion Quiz
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5 questions, one answer each
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1. What is physical digestion?
- A. Breakdown of food into smaller pieces with no chemical change
- B. Breakdown of large molecules into smaller molecules using enzymes
- C. Absorption of nutrients into the blood
- D. Removal of undigested food from the body
2. Which teeth are used for tearing food?
- A. Incisors
- B. Canines
- C. Premolars
- D. Molars
3. Why does physical digestion increase the surface area of food?
- A. It changes the food's chemical structure
- B. It allows enzymes to act on the food more quickly
- C. It kills harmful bacteria in the food
- D. It removes water from the food
4. What role does bile play in fat digestion?
- A. It breaks fat molecules into fatty acids and glycerol
- B. It emulsifies fat, increasing surface area for lipase
- C. It kills bacteria in the fat
- D. It absorbs fat into the blood
5. A student says bile chemically breaks down fat into fatty acids. Why is this incorrect?
- A. Bile does not interact with fat at all
- B. Bile emulsifies fat physically; lipase chemically breaks it into fatty acids and glycerol
- C. Bile only acts on proteins
- D. Fat is not digested chemically at all