Human body organs digestive and respiratory systems - Question Bank
1. The exchange of gases between the blood and the body tissues is called:
2. The enzyme pepsin, active in the stomach, is responsible for the initial breakdown of:
3. Which part of the small intestine is the longest?
4. What is the main function of the nasal cavity in the respiratory system?
5. The process of waste elimination from the digestive tract is called:
6. Which organ is responsible for filtering waste products from the blood and producing urine?
7. The involuntary muscle contractions that move food through the digestive tract are called:
8. What is the primary function of the bronchioles?
9. The liver produces bile, which is stored in the gallbladder and released into the:
10. The substance that lubricates food and begins carbohydrate digestion in the mouth is:
11. Which of the following is the primary organ of gas exchange in the human body?
12. The process by which diaphragm contracts and the rib cage expands, drawing air into the lungs, is called:
13. The vocal cords are located within which structure?
14. What is the primary role of hydrochloric acid in the stomach?
15. The lining of the small intestine has finger-like projections called villi, which increase the surface area for:
16. The pharynx is part of which two systems?
17. Which enzyme, secreted by the pancreas, digests proteins?
18. Where does the digestion of fats primarily occur?
19. The exchange of oxygen from the alveoli into the blood is driven by:
20. The main function of the epiglottis is to:
21. Which hormone stimulates the secretion of gastric juices in the stomach?
22. The chemical digestion of proteins begins in the:
23. Which part of the digestive system absorbs water and electrolytes and forms feces?
24. Oxygen binds to which component of red blood cells for transport?
25. The process of releasing air from the lungs is called:
26. The smallest airways in the lungs that lead to the alveoli are called:
27. The airways that branch from the trachea into the lungs are called:
28. What flap of cartilage prevents food from entering the trachea during swallowing?
29. The part of the throat that is common to both the digestive and respiratory systems is the:
30. Carbon dioxide is transported in the blood primarily as:
31. Which blood vessels surround the alveoli to facilitate gas exchange?
32. The process of taking air into the lungs is called:
33. The muscular sheet located below the lungs that plays a major role in breathing is the:
34. Tiny air sacs in the lungs where gas exchange occurs are called:
35. The primary function of the respiratory system is:
36. The windpipe, which carries air from the larynx to the bronchi, is called the:
37. Which part of the respiratory system is commonly known as the voice box?
38. The primary role of the large intestine in digestion is:
39. The rhythmic contractions of the digestive tract that move food along are called:
40. Which of these is NOT an accessory organ of digestion?
41. The final section of the large intestine, terminating at the anus, is the:
42. What substance is produced by the stomach lining to protect it from its own acidic environment?
43. The pancreas secretes digestive enzymes into which part of the digestive system?
44. The small sac that stores bile produced by the liver is called the:
45. Which organ produces bile, which aids in fat digestion?
46. What is the main function of the stomach in digestion?
47. The muscular tube connecting the pharynx (throat) to the stomach is known as the:
48. Which enzyme, found in saliva, begins the digestion of starch?
49. Where does most of the absorption of nutrients from digested food occur?
50. The process of breaking down food into smaller molecules that can be absorbed is called: