The Lower Respiratory Tract Quiz
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Questions and Answers

Which structure is responsible for the primary gas exchange in the respiratory tract?

  • Capillaries
  • Bronchi
  • Cartilaginous rings
  • Alveoli (correct)

    • What is the approximate number of alveoli in our lungs?

  • 100 million
  • 300 million (correct)
  • 200 million
  • 400 million

    • What is the function of the bronchi?

  • Gas exchange
  • Distributing air to the lungs (correct)
  • Cleansing air
  • Warming air

    • What is the function of the alveoli?

    <p>Gas exchange</p> Signup and view all the answers

    What is the role of surfactant in the alveoli?

    <p>Reducing surface tension</p> Signup and view all the answers

    Which structure forms the wall of the alveoli?

    <p>A single layer of cells</p> Signup and view all the answers

    What is the barrier through which gases exchange between the alveolar air and blood capillaries called?

    <p>Respiratory membrane</p> Signup and view all the answers

    What helps keep the alveoli open?

    <p>Cartilaginous rings</p> Signup and view all the answers

    What is the function of mucus in the respiratory tract?

    <p>Cleansing air</p> Signup and view all the answers

    What is the role of capillaries in the lungs?

    <p>Gas exchange</p> Signup and view all the answers

    Which structure holds up the main structure of the trachea?

    <p>C-shaped cartilage rings</p> Signup and view all the answers

    What is the function of the trachea?

    <p>To direct air into the lungs</p> Signup and view all the answers

    What is the name of the tube that extends from the larynx to the primary bronchi?

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

    What is the diameter of the trachea?

    <p>2.5cm</p> Signup and view all the answers

    Which part of the respiratory system expels mucus upward toward the pharynx?

    <p>Respiratory mucosa with goblet cells</p> Signup and view all the answers

    How many levels of divisions are there in the bronchial tree?

    <p>23</p> Signup and view all the answers

    What is the main site of gas exchange in the lung?

    <p>Alveolar sacs</p> Signup and view all the answers

    Which bronchus is slightly larger and more vertical?

    <p>Right bronchus</p> Signup and view all the answers

    What is the last conducting portion of the respiratory system?

    <p>Terminal bronchioles</p> Signup and view all the answers

    What is the function of the bronchi?

    <p>To direct air into the lungs</p> Signup and view all the answers

    Which structure forms the wall of the trachea?

    <p>Cartilage rings</p> Signup and view all the answers

    What is the function of the bronchioles?

    <p>To divide into alveolar sacs</p> Signup and view all the answers

    What is the function of the alveoli?

    <p>To facilitate gas exchange</p> Signup and view all the answers

    What is the role of the capillaries in the lungs?

    <p>To facilitate gas exchange</p> Signup and view all the answers

    What is the approximate length of the trachea?

    <p>11 cm</p> Signup and view all the answers

    What is the role of surfactant in the alveoli?

    <p>To reduce surface tension</p> Signup and view all the answers

    What is the function of the respiratory bronchioles?

    <p>To facilitate gas exchange</p> Signup and view all the answers

    What is the function of the goblet cells in the trachea?

    <p>To expel mucus upward toward the pharynx</p> Signup and view all the answers

    What is the function of the primary bronchi?

    <p>To direct air into and out of the lungs</p> Signup and view all the answers

    What is the function of the trachea?

    <p>To direct air through an open passageway into and out of the lungs</p> Signup and view all the answers

    Which structure in the respiratory tract is responsible for efficient gas exchange due to its thin walls?

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

    What is the function of the respiratory membrane?

    <p>To exchange gases between the alveolar air and blood capillaries</p> Signup and view all the answers

    What is the purpose of surfactant in the alveoli?

    <p>To reduce surface tension and prevent collapse of the alveoli</p> Signup and view all the answers

    What is the primary function of the bronchi?

    <p>To distribute air to the lungs interior</p> Signup and view all the answers

    What is the approximate number of alveoli estimated to be in our lungs?

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

    What is the function of the cartilaginous rings in the respiratory system?

    <p>To provide structural support</p> Signup and view all the answers

    What is the role of the capillaries in the lungs?

    <p>To facilitate gas exchange with the alveoli</p> Signup and view all the answers

    What is the role of mucus in the respiratory tract?

    <p>To cleanse, warm, and humidify air</p> Signup and view all the answers

    What is the last conducting portion of the respiratory system before reaching the alveoli?

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

    What provides structural support to keep the alveoli open?

    <p>Cartilaginous rings</p> Signup and view all the answers

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