Physiology for Physical Therapy: Respiration 1 Review
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Questions and Answers

What is responsible for 75% of the air that enters the lungs?

  • Contraction of external intercostals
  • Diaphragmatic contraction (correct)
  • Accessory muscles of inspiration
  • Contraction of expiratory muscles

Which muscles elevate the ribs during breathing?

  • Expiratory muscles
  • Accessory muscles of inspiration
  • Diaphragm
  • External intercostals (correct)

What is the primary mechanism for forced expiration?

  • Accessory muscles of inspiration
  • Contraction of external intercostals
  • Diaphragmatic contraction
  • Contraction of expiratory muscles (correct)

During inspiration, what occurs when the external intercostals contract?

<p>Increase in chest cavity dimensions (B)</p> Signup and view all the answers

How is oxygen primarily transported in the blood?

<p>Bound to hemoglobin (A)</p> Signup and view all the answers

In what form is 90% of carbon dioxide carried in the plasma?

<p>As bicarbonate ions (D)</p> Signup and view all the answers

Which group of muscles contract during forced inspiration?

<p>Accessory muscles of expiration (C)</p> Signup and view all the answers

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