Respiratory System - Nose and Pharynx Functions
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Questions and Answers

What is the main factor affecting breathing rate?

  • Increased H+ concentration leading to decreased pH (correct)
  • Low CO2 concentration in the blood
  • High O2 concentration in the blood
  • Elevated blood pressure

    • During strenuous exercise, why does breathing rate increase?

  • To decrease O2 levels in the body
  • To increase H+ levels in the blood
  • To expand lung capacity
  • To decrease CO2 levels in the body (correct)

    • What stimulates chemoreceptors to increase breathing rate?

  • A large drop in CO2 levels
  • A large drop in O2 levels (correct)
  • A high blood pressure reading
  • An increase in body temperature

    • What is the main component of gas exchange in the lungs and tissues?

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

    What is the function of fetal breathing movements during development?

    <p>To practice for post-birth breathing</p> Signup and view all the answers

    What characteristic of fetal blood makes it suitable for gas exchange at low pressures?

    <p>Greater affinity for O2</p> Signup and view all the answers

    What is the main function of the cilia in the nose?

    <p>To push mucus and debris toward the throat</p> Signup and view all the answers

    Which part of the respiratory system serves as a major entrance and exit?

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

    What is the purpose of the epiglottis in the larynx?

    <p>To close off the trachea during swallowing</p> Signup and view all the answers

    Where does gas exchange primarily occur in the respiratory system?

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

    Which term refers to the difficulty expanding the thoracic wall?

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

    What does pulmonary ventilation refer to?

    <p>Breathing, moving air in and out of the lungs</p> Signup and view all the answers

    What is the role of the carina in the respiratory system?

    <p>Induce coughing if a foreign body is present</p> Signup and view all the answers

    What is Boyles law related to in terms of respiratory physiology?

    <p>Relationship between pressure and volume of air in lungs</p> Signup and view all the answers

    Which structure in the lungs is highly permeable to gases?

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

    What does total lung capacity represent?

    <p>The maximum air possible after a forceful inhalation</p> Signup and view all the answers

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