Sure, here are 50 one-liner questions about the digestive system with answers:

1. **What is the primary function of the digestive system?**
   - To break down food and absorb nutrients.

2. **Where does digestion begin in the human body?**
   - In the mouth.

3. **What enzyme in saliva breaks down starches?**
   - Amylase.

4. **What is the role of the esophagus in digestion?**
   - To transport food from the mouth to the stomach.

5. **What is the function of the stomach in digestion?**
   - To break down food using acid and enzymes.

6. **Which acid is produced by the stomach to aid digestion?**
   - Hydrochloric acid (HCl).

7. **What is the semi-liquid mixture of partially digested food and gastric juices called?**
   - Chyme.

8. **What is the primary function of the small intestine?**
   - Absorption of nutrients.

9. **What are the three sections of the small intestine?**
   - Duodenum, jejunum, and ileum.

10. **Which organ produces bile?**
    - The liver.

11. **Where is bile stored and concentrated?**
    - In the gallbladder.

12. **What is the role of bile in digestion?**
    - To emulsify fats.

13. **Which organ produces digestive enzymes and bicarbonate?**
    - The pancreas.

14. **What is the function of pancreatic enzymes?**
    - To break down carbohydrates, proteins, and fats.

15. **What is the primary function of the large intestine?**
    - To absorb water and form feces.

16. **What are the main sections of the large intestine?**
    - Cecum, colon, rectum, and anus.

17. **What is the appendix attached to?**
    - The cecum.

18. **What is the function of the rectum?**
    - To store feces before elimination.

19. **Which part of the digestive system is responsible for nutrient absorption?**
    - The small intestine.

20. **What are villi and where are they found?**
    - Finger-like projections in the small intestine that increase surface area for absorption.

21. **What is peristalsis?**
    - The wave-like muscle contractions that move food through the digestive tract.

22. **Which nutrient begins to be digested in the mouth?**
    - Carbohydrates.

23. **What is the role of the epiglottis during swallowing?**
    - To prevent food from entering the trachea.

24. **Which part of the digestive system is primarily involved in water absorption?**
    - The large intestine.

25. **What is the primary component of feces?**
    - Water and undigested food material.

26. **What is the term for the rhythmic contraction of muscles in the digestive tract?**
    - Peristalsis.

27. **What is the main function of the liver in digestion?**
    - To produce bile and process nutrients.

28. **Which part of the digestive system has the highest surface area for absorption?**
    - The small intestine.

29. **How long is the average adult small intestine?**
    - About 20 feet (6 meters).

30. **What is the function of the enzyme pepsin?**
    - To break down proteins in the stomach.

31. **Which hormone stimulates the release of stomach acid?**
    - Gastrin.

32. **What is the role of the large intestine's bacteria?**
    - To help digest certain materials and produce vitamins.

33. **What is the term for the muscular valve that controls the release of stomach contents into the small intestine?**
    - The pyloric sphincter.

34. **Which structure