Respiratory System Anatomy and Physiology
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Respiratory System Anatomy and Physiology

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Questions and Answers

What is the primary effect of diaphragm contraction on thoracic cavity dimensions?

  • No change in thoracic cavity dimensions
  • Increase in vertical dimension (correct)
  • Decrease in vertical dimension
  • Decrease in anteroposterior dimension

    • What is the main function of the intercostal muscles in respiration?

  • Elevating and outwardly moving the ribcage (correct)
  • Deflating the lungs
  • Inflating the lungs
  • Contracting the diaphragm

    • What happens to the thoracic cavity volume during inhalation?

  • It is uncertain
  • It remains the same
  • It increases (correct)
  • It decreases

    • What is the result of the descent of the diaphragm during inhalation?

    <p>More space for the lungs to expand</p> Signup and view all the answers

    What is the primary effect of chest contraction on thoracic cavity dimensions?

    <p>Increase in anteroposterior and lateral dimensions</p> Signup and view all the answers

    What is the outcome of the increased thoracic cavity dimensions during inhalation?

    <p>More air enters the lungs</p> Signup and view all the answers

    What is the overall effect of diaphragm and chest contraction on lung volume?

    <p>Increase in lung volume</p> Signup and view all the answers

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