Respiratory Anatomy and Physiology: Lecture 3 Quiz
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Questions and Answers

What is the function of the alveolus?

  • To produce mucus to trap dust and pathogens
  • To exchange oxygen and carbon dioxide with the bloodstream (correct)
  • To warm the air before it enters the lungs
  • To humidify the air before it reaches the lungs
  • Which of the following is included in the upper respiratory tract (URT)?

  • Nasal passages (correct)
  • Alveoli
  • Trachea
  • Terminal bronchioles
  • Where does the respiratory zone extend to in the lungs?

  • Pharynx
  • Alveoli (correct)
  • Trachea
  • Terminal bronchioles
  • What does the conducting zone of the respiratory system include?

    <p>Nasal passages</p> Signup and view all the answers

    What is necessary for respiration to occur?

    <p>Adequate supply of oxygen and elimination of carbon dioxide</p> Signup and view all the answers

    Which major respiratory organ is responsible for vocalization?

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

    What is the predominant function of the alveoli?

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

    In which part of the respiratory system does cartilage decrease and smooth muscle increase?

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

    What is the primary function of the conducting zone of the respiratory system?

    <p>Passage of gases to and from the alveoli</p> Signup and view all the answers

    Which structure divides into two primary bronchi at the carina?

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

    What is the function of the pharynx in the respiratory system?

    <p>Passage between nasal cavities and larynx</p> Signup and view all the answers

    What is the role of alveolar macrophages in the respiratory system?

    <p>Phagocytosis of small particles and micro-organisms</p> Signup and view all the answers

    Which group of neurons send signals to the diaphragm via the phrenic nerve?

    <p>Inspiratory group of neurons</p> Signup and view all the answers

    What is the main stimulus for the peripheral chemoreceptors to influence the rate and depth of breathing?

    <p>Low arterial O2 levels</p> Signup and view all the answers

    Which part of the brain is responsible for voluntary control of breathing?

    <p>Cerebral cortex</p> Signup and view all the answers

    What is the primary role of the external intercostal muscles in respiration?

    <p>Assisting with inhalation</p> Signup and view all the answers

    Which factor primarily influences reflex activity in response to irritants or lung inflation?

    <p>Strong emotions and pain</p> Signup and view all the answers

    What is the role of central chemoreceptors in regulating respiration?

    <p>Responding to high arterial CO2 levels</p> Signup and view all the answers

    Which stimuli cause the peripheral chemoreceptors to become a major influence on the rate and depth of breathing?

    <p>Low arterial CO2 levels</p> Signup and view all the answers

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