Respiratory System Structure and Function
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Questions and Answers

At which three levels does the respiratory system operate?

  • nose, pharynx, and trachea
  • pulmonary gas exchange, tissue gas, and cellular pulmonary gas exchange (correct)
  • pulmonary gas exchange, tissue gas, and cellular metabolism
  • respiratory tract, bronchi, and alveoli

    • What is the function of the larynx in the respiratory system?

  • to regulate blood pH
  • to produce chemical mediators
  • to humidify air
  • to keep the airway patent (correct)

    • What separates the left and right bronchi?

  • the diaphragm
  • the carina (correct)
  • the pharynx
  • the trachea

    • What is the number of alveoli responsible for pulmonary gas exchange?

    <p>300 million</p> Signup and view all the answers

    What type of tissue is the trachea composed of?

    <p>dense regular connective tissue and smooth muscle</p> Signup and view all the answers

    How many lobes does the left lung contain?

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

    Which of the following is NOT a primary organ of the digestive system?

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

    What is the function of the myenteric plexus?

    <p>to promote rhythmic contractions</p> Signup and view all the answers

    What is the approximate length of the GI tract?

    <p>25 feet</p> Signup and view all the answers

    What is the term for the nervous system that regulates the digestive system internally?

    <p>enteric nervous system</p> Signup and view all the answers

    What is the primary function of the salivary glands?

    <p>to produce digestive enzymes</p> Signup and view all the answers

    Which of the following cranial nerves is involved in tasting food?

    <p>cranial nerve 7</p> Signup and view all the answers

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