Pulmonary Alveolar Cells Quiz
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Questions and Answers

Which cell type is found in the epithelium of respiratory bronchioles?

  • Simple columnar ciliated epithelium
  • Squamous epithelium
  • Simple cuboidal epithelium (correct)
  • Pseudostratified columnar ciliated epithelium

    • What is the key function of the respiratory portion of the respiratory system?

  • Waste elimination
  • Hormone production
  • Nutrient absorption
  • Gas exchange between blood and inspired air (correct)

    • Which component is NOT part of the respiratory portion of the respiratory system?

  • Bronchial tubes (correct)
  • Alveolar sacs
  • Respiratory bronchioles
  • Alveoli

    • What is the main histological feature of interalveolar septa?

    <p>Presence of connective tissue</p> Signup and view all the answers

    Which type of epithelium lines the terminal bronchioles?

    <p>Simple cuboidal partially ciliated epithelium</p> Signup and view all the answers

    What is the essential structure responsible for the blood-air barrier in the respiratory system?

    <p>Alveoli</p> Signup and view all the answers

    Which cellular component is responsible for the secretion of pulmonary surfactant?

    <p>Type I pneumocytes</p> Signup and view all the answers

    Where do Alveolar Macrophages originate from?

    <p>Blood monocytes</p> Signup and view all the answers

    What is the main function of Alveolar Macrophages in the lungs?

    <p>Engulf RBCs in congestive heart failure</p> Signup and view all the answers

    What is the role of type I pneumocytes in the blood-air barrier?

    <p>Allowing diffusion of gases between alveolar air &amp; RBCs</p> Signup and view all the answers

    Where are alveolar pores (of Kohn) located?

    <p>Within the alveolar septa</p> Signup and view all the answers

    What is the specific function of elastic fibers in the interalveolar walls (septa)?

    <p>Supporting and preventing over-expansion</p> Signup and view all the answers

    How does Pleural effusion occur?

    <p>Accumulation of fluid in the pleural cavity</p> Signup and view all the answers

    What is the main function of the pleural cavity fluid?

    <p>To lubricate and reduce friction during breathing</p> Signup and view all the answers

    Which cell type acts as a protective barrier against bronchial asthma?

    <p>Club cells</p> Signup and view all the answers

    In ARDS, what happens when fluid from blood plasma accumulates in the pleural cavity?

    <p>ARDS progresses to pleural effusion</p> Signup and view all the answers

    Which layer of the pleural membranes contains mesothelial cells?

    <p>Visceral layer</p> Signup and view all the answers

    What is the epithelial type that lines the lung bronchioles?

    <p>Simple columnar ciliated with Clara cells</p> Signup and view all the answers

    Which type of alveolar cells are responsible for gas exchange with red blood cells?

    <p>Type I pneumocytes</p> Signup and view all the answers

    What is the function of type II pneumocytes?

    <p>Synthesize and secrete pulmonary surfactant</p> Signup and view all the answers

    Which organelles are present in type II pneumocytes to support surfactant synthesis?

    <p>Smooth endoplasmic reticulum (SER) and Golgi</p> Signup and view all the answers

    What is the primary function of lamellar bodies in type II pneumocytes?

    <p>Store surfactant for release</p> Signup and view all the answers

    Which type of junctions are present between adjacent type I and type II pneumocytes?

    <p>Tight junctions and desmosomes</p> Signup and view all the answers

    What is the primary role of type I pneumocytes in the alveoli?

    <p>Facilitate gas exchange with red blood cells</p> Signup and view all the answers

    Which type of muscle fibers are found in the muscle layer of the bronchioles?

    <p>Circular smooth muscle fibers</p> Signup and view all the answers

    What is the main function of Club (Clara) Cells in the bronchiolar epithelium?

    <p>Protection against emphysema</p> Signup and view all the answers

    How do Bronchioles differ from Intrapulmonary Bronchi in terms of the presence of mucoserous glands?

    <p>Bronchioles have absent mucoserous glands while Intrapulmonary Bronchi have present mucoserous glands</p> Signup and view all the answers

    What is the function of the Adventitia in the bronchioles?

    <p>Provide elasticity to the bronchial wall</p> Signup and view all the answers

    What type of epithelium is found in the Mucosal epithelium of Bronchioles?

    <p>Simple columnar or cuboidal ciliated with Club cells (no goblet cells)</p> Signup and view all the answers

    Why do Goblet cells disappear just before the level where cilia disappear in the bronchiolar epithelium?

    <p>To avoid accumulation of secretions</p> Signup and view all the answers

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