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Chapter 17: The Respiratory System

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Which of the following components increase(s) as a proportion of the respiratory tract wall from trachea to alveoli?

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a. Cilia

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b. Elastic fibers

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c. Smooth muscle

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d. Cartilage

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e. Goblet cells

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Air moving rapidly across the vocal cords and causing them to vibrate and produce sound is contacting what type of epithelium?

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a. Pseudostratified ciliated

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b. Stratified squamous keratinized

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c. Stratified squamous nonkeratinized

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d. Simple squamous

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e. Simple cuboidal

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Which structural feature distinguishes between terminal and respiratory bronchioles?

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a. Alveoli

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b. Cilia

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c. Exocrine bronchiolar cells

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d. Mucous glands in lamina propria

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e. Smooth muscle

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Which of the following features distinguishes a bronchus within a lung from the primary bronchi?

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a. Glands in the submucosa

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b. Pseudostratified ciliated columnar epithelium

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c. Smooth muscle in the wall

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d. Irregular plates of cartilage

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e. Goblet cells in the epithelium

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Which feature involved in protection of the respiratory tract is absent from the digestive tract?

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a. Goblet cells

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b. Cilia

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c. Lymphoid nodules

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d. Secretory IgA

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e. Tight junctions

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Which of the following is true of pulmonary surfactant?

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a. Secreted by type I pneumocytes

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b. Forms layer rich in phospholipid overlying a thin aqueous phase

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c. Prevents alveolar collapse by increasing surface tension

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d. Does not affect bacterial survival

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e. Is secreted by goblet cells

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The pulmonary (functional) and bronchial (nutritive) arterial systems enter the lungs separately at the hilus but anastomose into ...

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