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Chapter 15. Toxic Responses of the Respiratory System
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Which of the following statements is FALSE regarding the role of mucus in the conducting airways?
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a. Pollutants trapped by mucus can be eliminated via expectoration or swallowing.
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b. Mucus is of a basic pH.
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c. The beating of cilia propels mucus out of the lungs.
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d. Mucus plays a role promoting oxidative stress.
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e. Free radical scavenging is believed to be a role of mucus.
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Respiratory distress syndrome sometimes affects premature neonates due to lack of surfactant production by which of the following cell types?
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In a situation where there is an increased metabolic demand for oxygen, which of the following volume measurements will greatly increase?
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a. total lung capacity (TLC).
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c. functional residual capacity (FRC).
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The free radicals that inflict oxidative damage on the lungs are generated by all of the following EXCEPT:
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Which of the following gases would most likely pass all the way through the respiratory tract and diffuse into the pulmonary blood supply?
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All of the following statements regarding particle deposition and clearance are true EXCEPT:
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a. One of the main modes of particle clearance is via mucociliary escalation.
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b. Diffusion is important in the deposition of particles in the bronchial regions.
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c. Larger volumes of inspired air increase particle deposition in the airways.
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d. Sedimentation results in deposition in the bronchioles.
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