Human Respiratory System Quiz
1. What is the main function of the alveoli in the lungs?
- To filter air
- To exchange gases
- To transport oxygen
- To produce mucus
2. Which muscle is primarily responsible for breathing?
- Diaphragm
- Intercostal muscles
- Abdominal muscles
- Pectoral muscles
3. What is the trachea commonly known as?
- Windpipe
- Voice box
- Nasal cavity
- Bronchus
4. Which structure prevents food from entering the trachea?
- Epiglottis
- Uvula
- Larynx
- Pharynx
5. What is the primary gas exchanged in the alveoli?
- Nitrogen
- Oxygen
- Carbon dioxide
- Helium
6. Which part of the respiratory system warms and moistens the air?
- Lungs
- Nasal cavity
- Trachea
- Bronchi
7. How many lobes does the right lung have?
- 2
- 3
- 4
- 5
8. Which respiratory structure is most affected by asthma?
- Alveoli
- Bronchioles
- Trachea
- Larynx
9. What term is used to describe the difficulty in breathing?
- Tachycardia
- Dysphagia
- Dyspnea
- Cyanosis
10. What is the primary role of the cilia in the respiratory tract?
- To secrete mucus
- To trap and remove particles
- To transport oxygen
- To produce sound
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