Questions on Human Digestive System
20 multiple choice questions about the Human Digestive System, designed for students learning human biology. The answers are listed at the end.
Multiple Choice Questions: Human Digestive System
1. Which of the following is the primary function of the digestive system?
A) Transport oxygen
B) Produce hormones
C) Break down food for nutrients
D) Regulate body temperature
2. Where does digestion begin in the human body?
A) Stomach
B) Esophagus
C) Mouth
D) Small intestine
3. Which enzyme in saliva helps digest carbohydrates?
A) Pepsin
B) Lipase
C) Amylase
D) Trypsin
4. What is the role of the esophagus?
A) Digest proteins
B) Absorb nutrients
C) Carry food from mouth to stomach
D) Produce bile
5. What type of digestion occurs in the mouth?
A) Only mechanical
B) Only chemical
C) Mechanical and chemical
D) No digestion
6. Which organ stores bile produced by the liver?
A) Pancreas
B) Stomach
C) Gallbladder
D) Small intestine
7. What is the main function of the stomach?
A) Absorption of nutrients
B) Storing water
C) Breaking down food using acids and enzymes
D) Filtering waste
8. Which enzyme in the stomach helps break down proteins?
A) Amylase
B) Pepsin
C) Trypsin
D) Lipase
9. Where does most nutrient absorption take place?
A) Large intestine
B) Stomach
C) Small intestine
D) Mouth
10. What increases the surface area for absorption in the small intestine?
A) Bile
B) Saliva
C) Villi
D) Mucus
11. What is the role of the pancreas in digestion?
A) Store vitamins
B) Absorb water
C) Produce digestive enzymes
D) Filter blood
12. Which part of the digestive system absorbs water?
A) Mouth
B) Small intestine
C) Liver
D) Large intestine
13. What is the function of bile in digestion?
A) Break down carbohydrates
B) Digest proteins
C) Emulsify fats
D) Absorb water
14. Which of the following is not a part of the digestive tract?
A) Esophagus
B) Liver
C) Stomach
D) Small intestine
15. Which organ produces bile?
A) Pancreas
B) Gallbladder
C) Stomach
D) Liver
16. The movement of food through the digestive tract is called:
A) Digestion
B) Emulsification
C) Absorption
D) Peristalsis
17. Which part of the digestive system is responsible for producing insulin?
A) Liver
B) Pancreas
C) Stomach
D) Gallbladder
18. What structure prevents food from entering the windpipe during swallowing?
A) Tongue
B) Epiglottis
C) Larynx
D) Esophagus
19. Which of the following organs is responsible for detoxifying chemicals and metabolizing drugs?
A) Stomach
B) Small intestine
C) Liver
D) Pancreas
20. The waste material left after digestion is expelled through the:
A) Urethra
B) Anus
C) Small intestine
D) Gallbladder
Answer Key
1. C) Break down food for nutrients
2. C) Mouth
3. C) Amylase
4. C) Carry food from mouth to stomach
5. C) Mechanical and chemical
6. C) Gallbladder
7. C) Breaking down food using acids and enzymes
8. B) Pepsin
9. C) Small intestine
10. C) Villi
11. C) Produce digestive enzymes
12. D) Large intestine
13. C) Emulsify fats
14. B) Liver
15. D) Liver
16. D) Peristalsis
17. B) Pancreas
18. B) Epiglottis
19. C) Liver
20. B) Anus
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