1. Which of the following is an accessory organ of digestion?
A. Esophagus
B. Large intestine
C. Small intestine
D. Pancreas
2. What is the term for the process where food is swallowed?
A. Mastication
B. Peristalsis
C. Deglutition
D. Absorption
3. Which organ produces enzymes that digest all three major types of food: carbohydrates, proteins, and fats?
A. Liver
B. Stomach
C. Pancreas
D. Small intestine
4. What substance is stored in the gallbladder and released into the small intestine?
A. Enzymes
B. Bile
C. Acid
D. Mucus
5. Which organ produces bile, essential for fat digestion?
A. Stomach
B. Pancreas
C. Liver
D. Gallbladder
6. What is the primary function of the rectum?
A. To absorb water.
B. To store feces before defecation.
C. To digest remaining food.
D. To produce digestive enzymes.
7. What is the function of saliva in the digestive process?
A. To neutralize stomach acid.
B. To break down proteins.
C. To moisten food and begin carbohydrate digestion with enzymes like amylase.
D. To absorb vitamins.
8. Which enzyme in the stomach begins the digestion of proteins?
A. Amylase
B. Lipase
C. Pepsin
D. Trypsin
9. What is the main function of the small intestine?
A. To absorb water from undigested material.
B. To store bile produced by the liver.
C. To complete the digestion of food and absorb most nutrients.
D. To produce digestive enzymes.
10. What is the primary role of the mouth in the digestive system?
A. To absorb nutrients from food.
B. To break down food mechanically and chemically.
C. To transport food to the stomach.
D. To eliminate waste products.
11. The muscular contractions that move food through the digestive tract are called:
A. Peristalsis
B. Diffusion
C. Absorption
D. Segmentation
12. Which of the following is NOT a digestive organ?
A. Pharynx
B. Diaphragm
C. Esophagus
D. Stomach
13. The appendix is a small pouch attached to which part of the digestive system?
A. Stomach
B. Small intestine
C. Large intestine (specifically the cecum)
D. Esophagus
14. What is the main function of the villi and microvilli in the small intestine?
A. To increase the surface area for absorption of nutrients.
B. To secrete digestive enzymes.
C. To churn and mix food.
D. To absorb water.
15. Where does most of the absorption of digested nutrients into the bloodstream occur?
A. Stomach
B. Large intestine
C. Small intestine
D. Esophagus
16. What is the primary role of the stomach in digestion?
A. To absorb water.
B. To store food temporarily, mix it with digestive juices, and begin protein digestion.
C. To absorb all nutrients.
D. To produce bile.
17. What happens to indigestible material in the large intestine?
A. It is absorbed into the bloodstream.
B. It is broken down by bacteria into vitamins.
C. It is formed into feces and eliminated from the body.
D. It is reabsorbed into the small intestine.
18. What is the acidic environment in the stomach primarily created by?
A. Bile salts
B. Hydrochloric acid
C. Pancreatic juice
D. Salivary amylase
19. The pharynx is a part of both the digestive and which other system?
A. Circulatory system
B. Respiratory system
C. Nervous system
D. Endocrine system
20. The process of chewing food is known as:
A. Deglutition
B. Mastication
C. Digestion
D. Absorption
21. Which digestive organ has the longest length?
A. Stomach
B. Small intestine
C. Large intestine
D. Esophagus
22. Which part of the digestive system is primarily responsible for absorbing water and electrolytes?
A. Small intestine
B. Large intestine
C. Esophagus
D. Stomach
23. Which of the following best describes the role of the stomachs lining?
A. To secrete bile.
B. To absorb water and electrolytes.
C. To secrete mucus, hydrochloric acid, and pepsinogen.
D. To produce villi for nutrient absorption.
24. Which organ secretes digestive enzymes that break down carbohydrates, proteins, and fats in the small intestine?
A. Liver
B. Gallbladder
C. Pancreas
D. Esophagus
25. The tube connecting the pharynx to the stomach is called the:
A. Trachea
B. Esophagus
C. Small intestine
D. Duodenum
