+20 Questions on Digestion
20 multiple choice questions on the topic of digestion, suitable for middle or high school students. The answers are provided at the end.
Multiple Choice Questions: Digestion
1. What is digestion?
A) The process of breathing
B) The breakdown of food into absorbable substances
C) The circulation of blood
D) The process of photosynthesis
2. Which organ is the first to receive food in the digestive system?
A) Esophagus
B) Small intestine
C) Mouth
D) Stomach
3. Which type of digestion involves chewing and grinding of food?
A) Chemical digestion
B) Mechanical digestion
C) Enzymatic digestion
D) Absorptive digestion
4. What enzyme begins the chemical digestion of starch in the mouth?
A) Lipase
B) Pepsin
C) Amylase
D) Trypsin
5. What is the tube called that connects the mouth to the stomach?
A) Trachea
B) Esophagus
C) Intestine
D) Pharynx
6. What acid is found in the stomach and aids digestion?
A) Sulfuric acid
B) Nitric acid
C) Hydrochloric acid
D) Carbonic acid
7. What is the semi-liquid food mixture in the stomach called?
A) Chyme
B) Bile
C) Bolus
D) Mucus
8. Which organ produces bile?
A) Pancreas
B) Gallbladder
C) Liver
D) Stomach
9. What is the function of bile in digestion?
A) Absorb glucose
B) Emulsify fats
C) Break down starch
D) Digest protein
10. Where does most chemical digestion and nutrient absorption take place?
A) Mouth
B) Stomach
C) Large intestine
D) Small intestine
11. Which finger-like projections increase surface area in the small intestine?
A) Alveoli
B) Cilia
C) Villi
D) Microtubules
12. Which enzyme digests proteins in the stomach?
A) Amylase
B) Lipase
C) Pepsin
D) Sucrase
13. Which organ produces enzymes that help digest proteins, carbohydrates, and fats?
A) Stomach
B) Pancreas
C) Gallbladder
D) Large intestine
14. Which part of the digestive system absorbs water?
A) Small intestine
B) Liver
C) Large intestine
D) Pancreas
15. What is peristalsis?
A) A hormone for digestion
B) Rhythmic contractions that move food
C) Production of saliva
D) Filtering of toxins
16. What is the role of the gallbladder?
A) Produces bile
B) Stores bile
C) Absorbs nutrients
D) Produces enzymes
17. Which structure prevents food from entering the windpipe?
A) Uvula
B) Epiglottis
C) Larynx
D) Pharynx
18. Which part of the digestive system is primarily responsible for waste elimination?
A) Pancreas
B) Small intestine
C) Large intestine
D) Esophagus
19. Which of these is not part of the digestive system?
A) Stomach
B) Lung
C) Liver
D) Small intestine
20. Which of the following nutrients begins digestion in the mouth?
A) Proteins
B) Fats
C) Carbohydrates
D) Vitamins
Answer Key
1. B) The breakdown of food into absorbable substances
2. C) Mouth
3. B) Mechanical digestion
4. C) Amylase
5. B) Esophagus
6. C) Hydrochloric acid
7. A) Chyme
8. C) Liver
9. B) Emulsify fats
10. D) Small intestine
11. C) Villi
12. C) Pepsin
13. B) Pancreas
14. C) Large intestine
15. B) Rhythmic contractions that move food
16. B) Stores bile
17. B) Epiglottis
18. C) Large intestine
19. B) Lung
20. C) Carbohydrates
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