10th Class Biology Chapter 3 Test03. Respiratory system

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The trachea is kept permanently open by:
   1. Cartilage rings
   2. Muscles
   3. Ligaments
   4. Fat cells
2. The most common cause of pneumonia is:
   1. Virus
   2. Fungus
   3. Bacteria
   4. Pollution
3. Which disease involves narrowing of bronchioles due to inflammation?
   1. Asthma
   2. Pneumonia
   3. Emphysema
   4. Bronchitis
4. The force that drives air into the lungs comes from:
   1. Muscle contraction only
   2. Heart pumping
   3. Ordinary air pressure
   4. Diaphragm pressure
5. The membrane surrounding each lung is called:
   1. Pleura
   2. Pericardium
   3. Diaphragm
   4. Epiglottis
6. What is the percentage of oxygen in expired air when a person is resting?
   1. 0.08
   2. 0.12
   3. 0.16
   4. 0.2
7. The cilia in the nasal cavity help to:
   1. Produce oxygen
   2. Trap particles of dust or smoke
   3. Absorb nutrients
   4. Circulate blood
8. The structure that surrounds the upper end of the trachea is called:
   1. Larynx
   2. Epiglottis
   3. Pharynx
   4. Bronchus
9. The only treatment for lung cancer is:
   1. Antibiotics
   2. Pneumonectomy or radiation
   3. Oxygen therapy
   4. Exercise and diet
10. The inner most chamber of the respiratory system into which air can be drawn:
    1. bronchiole
    2. bronchus
    3. bronchial tube
    4. alveoli