HISTO-RS

What is the basic functional unit of the lung?

• A. Alveolus
• B. Bronchiole
• C. Alveolar sac
• D. Pulmonary artery

What is the function of the respiratory system?

• A. Gas exchange
• B. Digestion
• C. Blood circulation
• D. Excretion

Which of the following cells are responsible for producing surfactant in the lungs?

• A. Type I alveolar cells
• B. Type II alveolar cells
• C. Macrophages
• D. Fibroblasts

What is the function of cilia in the respiratory system?

• A. Producing mucus
• B. Filtering air
• C. Warming air
• D. Moving mucus towards the pharynx

Which layer of the trachea contains c-shaped rings of cartilage?

• A. Mucosa
• B. Submucosa
• C. Adventitia
• D. Hyaline cartilage

Which of the following structures is not part of the conducting zone of the respiratory system?

• A. Bronchioles
• B. Alveolar ducts
• C. Trachea
• D. Nasal cavity

What type of epithelium lines the nasal cavity?

• A. Simple squamous
• B. Stratified squamous
• C. Simple columnar
• D. Pseudostratified ciliated columnar

Which of the following is a disorder of the respiratory system?

• A. Diabetes
• B. Bronchitis
• C. Hypertension
• D. Arthritis

What is the main function of the pleura in the respiratory system?

• A. To produce mucus
• B. To regulate air flow
• C. To reduce friction during breathing
• D. To provide oxygen to the lungs

Which of the following is true about the alveoli in the lungs?

• A. They are lined with smooth muscle
• B. They are responsible for gas exchange
• C. They are part of the conducting zone
• D. They have a thick epithelial layer