Pulmonary Circulation and Respiratory Membrane Quiz
9 Questions
26 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which of the following accurately describes the path of pulmonary circulation?

  • Left ventricle → pulmonary artery → pulmonary capillaries → pulmonary veins → right atrium
  • Right ventricle → pulmonary artery → pulmonary capillaries → pulmonary veins → left atrium (correct)
  • Left atrium → pulmonary artery → pulmonary capillaries → pulmonary veins → right ventricle
  • Right atrium → pulmonary vein → pulmonary capillaries → pulmonary artery → left ventricle

    • What is the primary process by which oxygen and carbon dioxide are exchanged between the alveolar air and the pulmonary blood?

  • Active transport
  • Osmosis
  • Diffusion (correct)
  • Facilitated diffusion

    • What is the approximate total surface area of the respiratory membrane in a normal adult human male?

  • 700 m²
  • 7000 m²
  • 70 m² (correct)
  • 7 m²

    • Which of the following is NOT a layer of the respiratory membrane?

    <p>Smooth muscle layer</p> Signup and view all the answers

    What is the approximate diameter of the pulmonary capillaries?

    <p>5 micrometers</p> Signup and view all the answers

    Which of the following factors can increase the thickness of the respiratory membrane?

    <p>Both edema fluid and fibrosis of the lungs</p> Signup and view all the answers

    What is the approximate number of alveoli present in the two lungs?

    <p>300 million</p> Signup and view all the answers

    What is the approximate average diameter of an alveolus?

    <p>0.2 millimeters</p> Signup and view all the answers

    Which of the following statements about the rate of diffusion through the respiratory membrane is TRUE?

    <p>The rate of diffusion is inversely proportional to the thickness of the membrane.</p> Signup and view all the answers

    Study Notes

    Pulmonary Circulation

    • The pathway of pulmonary circulation: right ventricle → pulmonary artery → right and left pulmonary arteries → pulmonary capillaries → pulmonary veins → left atrium

    Diffusion of Oxygen and Carbon Dioxide

    • Diffusion is the movement of gas molecules between the alveolar air and the pulmonary blood through the respiratory membrane
    • The respiratory unit is composed of a respiratory bronchiole, alveolar ducts, atria, and alveoli
    • There are approximately 300 million alveoli in the two lungs
    • Each alveolus has an average diameter of about 0.2 μm
    • The total surface area of the respiratory membrane is about 70 m2 in the normal adult human male

    Respiratory Membrane

    • The total quantity of blood in the capillaries of the lungs is 60-140 ml
    • The diameter of the pulmonary capillaries is only about 5 micrometers
    • The respiratory membrane consists of six layers:
      • Thin fluid lining the alveolus and containing surfactant
      • The alveolar epithelium
      • A basement membrane
      • An interstitial space between the alveolar epithelium and the capillary membrane
      • A capillary basement membrane
      • The capillary endothelial membrane

    Factors Affecting Gas Diffusion

    • The rate of diffusion through the membrane is inversely proportional to its thickness
    • Factors that increase the thickness of the respiratory membrane:
      • Edema fluid in the interstitial space of the membrane
      • Fibrosis of the lungs, which can increase the thickness of the respiratory membrane

    Studying That Suits You

    Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

    Quiz Team

    Description

    Test your knowledge on the pathway of pulmonary circulation and the process of diffusion through the respiratory membrane in the lungs. Explore concepts related to gas exchange in the alveoli and the structure of the respiratory unit.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser