About Respiratory System

Following are some of the multiple choice questions on the Respiratory System with answers that will help the students in developing their knowledge.

Respiratory System MCQ

1. The main organs of the respiratory system

  • heart
  • lungs
  • esophagus
  • trachea

2. How many lobes does the left lung have? Right lobe?

  • R:3, L:4
  • L:3, R:2
  • R:3, L:2
  • R:2, L:2

3. What is the correct name for the windpipe?

  • Trachea
  • Bronchus
  • Bronchiole
  • Larynx

4. To release carbon dioxide

  • exhale
  • inhale
  • cough
  • hiccup

5. To take in oxygen

  • exhale
  • cough
  • hiccup
  • inhale

6. Pressure moves from high to low

  • False
  • True

7. The process of diffusing oxygen from the blood, into the interstitial fluid and into the cells.

  • inspiration
  • expiration
  • internal respiration
  • external respiration

8. Illness of the lungs where the alveoli become inflamed and filled with fluid

  • Lung cancer
  • Bronchitis
  • Pneumonia
  • Emphysema

9. Density is calculated by...

  • volume/ mass
  • 1/mass
  • mass/volume
  • All of above

10. The circulatory system works with the ___________ system to provide our body with oxygen and get rid of CO2 (carbon dioxide).

  • respiratory
  • digestive
  • muscular
  • skeletal

11. How is carbon dioxide released from the body?

  • When we exhale
  • When we urinate
  • When we sweat
  • When we inhale

12. The upper respiratory system is composed of these divisions:

  • Nasal cavity
  • Pharynx
  • Bronchioles
  • Both A & B

13. Your lungs have as much surface area as a ___________

  • tennis court
  • soccer field
  • classroom desk
  • kitchen table

14. Hair in your nose and mucus help to trap dust, bacteria, and other materials from going into your lungs when you breathe in.

  • True
  • False

15. When you exhale, the diaphragm

  • moves upwards
  • moves downwards
  • flattens
  • none of the above

16. Men's voice are typically deeper because... (select all that apply)

  • They're longer
  • They're thicker
  • They're shorter
  • Both A & B

17. Pulmonary ventilation is...

  • Gas exchange between lungs and alveoli
  • Movement of air in and out of lungs
  • Gas exchange between alveolar and tissue
  • All of above

18. The Immune systems response to an ordinarily harmless substance.

  • Asthma
  • Emphysema
  • Allergies
  • Lung Cancer

19. The left lung has three lobes and the right lung has two.

  • True
  • False

20. Given the following structures:1. larynx2. nasal cavity3. pharynx4. tracheaWhich of the following is the correct order that air would flow during inhalation.

  • 1,2,3,4
  • 2,3,1,4
  • 2,1,3,4
  • 4,2,3,1 

21. What does the respiratory system release?

  • oxygen
  • glucose
  • carbon dioxide
  • ATP

22. What are the names of the air sacs in the lungs where gas exchange takes place?

  • Alveoli
  • Bronchi
  • Bronchioles
  • Intercostal muscles

23. What is the correct name for the voice box?

  • Trachea
  • Bronchus
  • Bronchiole
  • Larynx

24. What does the Larynx hold ?

  • The larynx holds the whole respitory system. 
  • The larynx holds the trachea. 
  • The larynx holds the vocal chords. 
  • The larynx hold the wind pipe. 

25. Tiny tubes that branch off of bronchi

  • capillaries
  • alveoli
  • bronchioles
  • pluera

26. Laryngitis is the inflammation of

  • Oropharynx
  • Pharynx
  • Glottis
  • Larynx

27. The larynx is apart of the upper respiratory system

  • True
  • False

28. At the end of broncioles are thin walled sacs called what?

  • trachea
  • bronchi
  • alveoli
  • pneumonia

29. Which of the following is not part of the Respiratory System?

  • Trachea
  • Larynx
  • Lungs
  • Stomach

30. What does the hard and soft palate divide?

  • larynx from glottis
  • epiglottis from trachea
  • pharynx from larynx
  • oral cavity from pharynx

31. What causes change in pressure when we breathe?

  • Carbon dioxide levels
  • Oxygen levels
  • Diaphragm movement
  • Hypoxia

32. Which answer is true?

  • Increase in volume= decrease in pressure
  • decrease in volume= increase in pressure
  • decrease in volume= decrease in pressure
  • Both A & B

33. These apply to exhilation

  • Diaphragm relaxes
  • Pressure is less outside the body
  • Diaphragm moves down
  • Both A & B

34. These apply to inhalation

  • Creates larger pressure in thoracic cavity
  • Diaphragm contracts
  • Ribs move out
  • All of above

35. What structure of the bronchial tree does not have cartilage?

  • Secondary bronchi
  • Primary bronchi
  • Bronchioles
  • Tertiary bronchi

36. What specific cavity contains the lungs?

  • Thoracic
  • Pleural cavity
  • Ventral
  • All of above

37. Which part of the Respiratory System plays a major role in speech? Also known as the voice box.

  • nose
  • pharynx
  • larynx
  • trachea

38. The two narrower tubes branching from the trachea that leads into the lungs

  • nose
  • bronchi
  • lungs
  • alveoli

39. A chamber behind the nose and mouth that leads to the trachea and is part of the digestive system and respiratory system.

  • pharynx
  • trachea
  • epiglottis
  • larynx

40. The large muscle that contracts and relaxes and moves air in and out of the lungs.

  • epiglottis
  • alveoli
  • diaphragm
  • trachea

41. Tiny hairlike structures that line your nose and most other airways of the respiratory system.

  • larynx
  • alveoli
  • cilia
  • diaphragm

42. The air tubes in your lungs branch off into smaller, narrower tubes called

  • bronchioles
  • trachea
  • larynx
  • cilia

43. An air tube that is held open by C-shaped rings of cartilage. Also known as the windpipe.

  • pharynx
  • trachea
  • nose
  • alveoli

44. The flap of tissue at the bottom of the pharynx which keeps food and liquids out of the rest of your respiratory system.

  • pharynx
  • larynx
  • trachea
  • epiglottis

45. Alveoli expand because they are...

  • coated with mucus
  • coated with surfactant
  • contain carbon dioxide
  • contain oxygen

46. The opening between vocal cords

  • glottis
  • epiglottis

47. A cavity within a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities.

  • Sinus
  • Nose
  • Pharynx
  • Larynx

48. The process of exchanging oxygen and carbon dioxide in the lungs.

  • inspiration
  • expiration
  • internal respiration
  • external respiration

49. The only externally visible part of the respiratory system

  • Eyes
  • Nose
  • Pharynx
  • Larynx

50. Olfactory receptors are located in the mucosa of the nose. What are these receptors used for?

  • sight
  • smell
  • touch
  • taste

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