MCQs on Respiratory System 1

1. Which of the following is not found in the upper respiratory tract ?
  1. Oropharynx
  2. Palatine tonsils
  3. Fauces
  4. Trachea       

2. The respiratory tract is lined with
  1. Simple squamous epithelium
  2. Stratified cuboidal epthelium
  3. Pseudostratified ciliated columnar epithelium   
  4. Simple ciliated columnar epithelium

3. Which of the following statements are false ?
  1. The larynx is also called the voice box
  2. The respiratory tract is also referred to as the bronchial tree
  3. Respiratory disease never reduces the ability to speak in complete sentences   
  4. The cricoid cartilage is a major landmark for a tracheostomy

4. How many lobes are thre in the left lung ?
  1. 1
  2. 2               
  3. 3
  4. 4

5. Which of the following is not part of respiration ?
  1. Internal ventilation           
  2. External respiration
  3. Pulmonary ventilation
  4. Transport of gases

6. Which gas law states that the pressure exerted by a gas is inversely proportional to its volume ?
  1. Henry's law
  2. Daton's law
  3. Boyle's law           
  4. Fick's law

7. With regards to the work of breathing, what forces must respiratory muscles overcome in order to inflate the lungs ?
  1. Natural elastic recoil of lung tissue
  2. Liquid/air surface tension
  3. Airway resistance
  4. All of the above       

8. How is themajority of oxygen transported around the body ?
  1. Dissolved in plasma
  2. Attached to haemoglobin       
  3. As bicarbonate ions
  4. Attached to plasma proteins

9. Which of the following statements on gseous exchange is true ?
  1. Arterial pulmonary circulation is low in carbon-di-oxide
  2. Venous pulmonary circulation is high in carbon-di-oxide
  3. The concentration of oxygen in the alveoli is higher than in lobular circulation    
  4. The concentration of  carbon-di-oxide in lobular circulation is lower than in the alveoli

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