Respiratory System Gas Exchange Tutorial 1
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Questions and Answers

What is the main mechanism for the initial movement of air into the lungs during inspiration?

  • Osmosis
  • Diffusion
  • Perfusion
  • Convection (correct)
  • Where does the actual exchange of gases occur in the lungs?

  • Bronchial tree
  • Alveoli sacs (correct)
  • Capillaries
  • Conducting zone
  • What is the process through which air in the smallest airways moves into the alveoli sacs?

  • Active transport
  • Filtration
  • Osmosis
  • Diffusion (correct)
  • Which part of the lung does air initially pass through to reach the respiratory zone of the bronchial tree?

    <p>Conducting zone</p> Signup and view all the answers

    What do the mechanics of breathing produce during inspiration?

    <p>Air flow</p> Signup and view all the answers

    In which part of the lungs does the movement of air involve convection?

    <p>Conducting zone</p> Signup and view all the answers

    According to Fick’s Law, the rate of transfer of a gas through a sheet of tissue is inversely proportional to:

    <p>Difference in gas partial pressure between the 2 sides</p> Signup and view all the answers

    Which factor is crucial to the alveoli remaining inflated, as mentioned in the text?

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

    What does the composition of air/the atmosphere at sea level consist of?

    <p>Carbon dioxide (~0.04%)</p> Signup and view all the answers

    What plays a vital role in keeping the alveoli inflated, as mentioned in the text?

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

    According to Boyles Law, what happens when the greater the number of gas molecules in an area?

    <p>The pressure they exert increases</p> Signup and view all the answers

    What is the effect of rapid shallow breathing on the amount of air reaching the alveoli?

    <p>It decreases the amount of fresh air reaching the alveoli</p> Signup and view all the answers

    In the alveoli, which gas has a greater partial pressure gradient across the respiratory membrane?

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

    What is the solubility comparison between carbon dioxide and oxygen?

    <p>Carbon dioxide is around 20 times more soluble than oxygen</p> Signup and view all the answers

    How does gas exchange occur in the alveoli?

    <p>By diffusion</p> Signup and view all the answers

    What are the factors affecting efficient gas exchange?

    <p>Concentration/pressure gradient, gas solubility, surface area of alveolar membrane, ventilation/perfusion coupling, thickness of alveolar membrane</p> Signup and view all the answers

    What happens to the amount of fresh air reaching the alveoli if you take very shallow breaths?

    <p>It decreases the amount of fresh air reaching the alveoli</p> Signup and view all the answers

    What is collateral ventilation integral to?

    <p>Assisting equal alveolar expansion</p> Signup and view all the answers

    What are the clinically termed names for blood gases in pulmonary arteries and veins?

    <p>Venous Blood Gases and Arterial Blood Gases (ABGs)</p> Signup and view all the answers

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