Histology of Respiratory system

Which of the following is the characteristic feature of trachea?

• C shaped hyaline cartilage

• Abundant smooth muscle

• Plates of hyaline cartilage

• Abundant elastic fibers

• C shaped elastic cartilage

Which of the following does not happen as you go down in distal parts of airways?

• Gradual  decrease in height of epithelial cells

• Gradual  increase in number of goblet cells

• Gradual  decrease in cilia

• Disappearance of cartilage

While performing bronchoscopy which layer of the respiratory tract comes in contact with the bronchoscope tube?

• Cartilage

• Mucosa

• Adventitia

• Submucosa

Which of the following cells produces surfactant?

• Type 1 pneumocyte

• Type 2 pneumocyte

• Dust cell

• Clara cell

Which structure is shown in the picture?

(a)  

Which of the following epithelium lines an alveolar duct?

• Simple squamous

• Ciliated cuboidal

• Simple cuboidal

• Ciliated columnar

Wall of which of the following structure is interrupted by alveoli?

• Primary bronchus

• Tertiary bronchus

• Terminal bronchiole

• Respiratory bronchiole

Which structure is seen abundantly in the lung?

(a)