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________ generally causes a rapid increase in the rate of mucus production in the nasal cavity and paranasal sinuses.


A) Exposure to noxious stimuli
B) Exposure to unpleasant stimuli
C) Exposure to allergens
D) Exposure to debris or pathogens
E) all of the above

F) A) and C)
G) B) and E)

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Carbonic anhydrase


A) is in RBCs.
B) is an enzyme.
C) can increase the amount of bicarbonate ion in plasma.
D) can convert carbon dioxide into carbonic acid.
E) all of the above

F) A) and E)
G) B) and E)

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What are the primary functions of the respiratory system?

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(1) Provide an extensive area for gas ex...

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The term hypercapnia refers to


A) the cessation of breathing.
B) elevated PCOâ‚‚.
C) elevated POâ‚‚.
D) an increase in pH.
E) labored breathing.

F) All of the above
G) A) and D)

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Which of the following would be greater?


A) hemoglobin's affinity for oxygen when the BPG level is high
B) hemoglobin's affinity for oxygen when the BPG level is low
C) Neither is greater.

D) B) and C)
E) A) and C)

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The common passageway shared by the respiratory and digestive systems is the


A) larynx.
B) glottis.
C) vestibule.
D) pharynx.
E) trachea.

F) A) and C)
G) C) and D)

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A mucosa consists of


A) an epithelium.
B) an underlying layer of areolar tissue.
C) stratified squamous cells.
D) both an epithelium and an underlying layer of areolar tissue.
E) both an underlying layer of areolar tissue and stratified squamous cells.

F) C) and D)
G) B) and E)

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