Respiratory System Development Quiz
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Questions and Answers

What is the primary function of the upper airway?

  • Gas exchange through the alveolar-capillary membrane
  • Speech and smell
  • Filtering air from foreign materials
  • Conduction of air, humidification, and warming of inspired air (correct)

    • At what stage does the respiratory system develop as a fluid-filled structure playing no role in gas exchange?

  • 24 to 26 weeks of gestation
  • Fetal stage (correct)
  • At birth
  • 2 to 3 years after birth

    • What is the approximate number of alveoli in a full-term newborn?

  • ~ 100 million
  • ~ 470 million
  • ~ 50 million (correct)
  • ~ 200 million

    • What separates the nasal cavity into two chambers?

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

    At what age does a child have approximately 470 million mature alveoli?

    <p>8-10 years old</p> Signup and view all the answers

    At what stage of gestation is a fetus generally capable of sufficient gas exchange, if born?

    <p>24 to 26 weeks</p> Signup and view all the answers

    What is the approximate number of alveoli in a child at 8-10 years old?

    <p>470 million</p> Signup and view all the answers

    Which structure is the primary site for the sense of smell in the upper airway?

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

    What separates the nasal cavity into two chambers?

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

    What is the primary function of the upper airway?

    <p>Conduction of air</p> Signup and view all the answers

    Which muscle group is primarily responsible for flexing the neck and elevating the first and second ribs?

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

    What are the primary functions of the trapezius muscles?

    <p>Rotate the scapula, raise shoulders, abduct arms</p> Signup and view all the answers

    Which muscle group is NOT part of the accessory muscles of expiration?

    <p>Internal Intercostal Muscles</p> Signup and view all the answers

    What is the primary function of the pectoralis major muscles?

    <p>Adduction of upper extremities</p> Signup and view all the answers

    Which muscle group is responsible for pulling the ribs upward and outward to increase AP and lateral diameters?

    <p>External Intercostal Muscles</p> Signup and view all the answers

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