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A sudden contraction of the diaphragm while the glottis is closed produces a sneeze.

A) True
B) False

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Smokers are more susceptible to respiratory infections because


A) they congregate in small areas to smoke.
B) their respiratory passages overproduce cilia,to which bacteria cling.
C) their respiratory passages lose cilia,which would otherwise remove bacteria.
D) the respiratory passages have too little mucus.

E) None of the above
F) All of the above

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The pharynx functions as a ______,whereas the larynx functions as a ______.


A) common passage for air and food;passageway for food only
B) passageway for air only;passageway for air and food
C) common passageway for air and food;passageway for air only
D) passageway for food only,passageway for air and food

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

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The amount of oxygen released from oxyhemoglobin increases when


A) carbon dioxide concentration decreases.
B) carbon dioxide concentration increases.
C) temperature decreases.
D) blood becomes more alkaline.

E) A) and B)
F) All of the above

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Coughing reflexes become faster with age.

A) True
B) False

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Carbon dioxide is sometimes added to the air that a patient breathes in order to


A) increase the rate and decrease the depth of breathing.
B) increase the rate and depth of breathing.
C) decrease the rate and increase the depth of breathing.
D) decrease the rate and depth of breathing.

E) B) and C)
F) None of the above

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Which of these laryngeal cartilages is single?


A) Cricoid
B) Arytenoid
C) Corniculate
D) Cuneiform

E) C) and D)
F) A) and C)

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A simple spirometer cannot measure which of the following air volumes?


A) Tidal volume
B) Vital capacity
C) Residual volume
D) Expiratory reserve volume

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

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Another word for breathing is ventilation.

A) True
B) False

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As the respiratory tube branches become smaller in diameter,


A) they have increased cartilage.
B) they have increased muscle fibers.
C) the epithelial lining changes to connective tissue.
D) the epithelial lining changes from pseudostratified ciliated columnar to cuboidal and simple squamous epithelium.

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

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Which of the following proteins transports some carbon dioxide in the blood?


A) Hemoglobin
B) Carbonic anhydrase
C) Heme
D) Albumin

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

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The walls of the alveoli are composed of


A) ciliated columnar epithelium.
B) simple squamous epithelium.
C) stratified squamous epithelium.
D) areolar connective tissue.

E) All of the above
F) B) and D)

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The nasal conchae create passageways in the nasal cavity called ______.

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The intensity (volume) of a vocal sound is a result of the


A) force of air passing over the vocal cords.
B) tension on the vocal cords.
C) size of the laryngeal cartilage.
D) shape of the laryngeal cartilage.

E) C) and D)
F) None of the above

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Arielle is an 8-year-old with cystic fibrosis.For 30 minutes each morning and evening,a parent holds her body in various positions and massages and kneads the areas over her lungs to dislodge the abundant,sticky mucus,which Arielle spits into a jar.She also takes medication - an enzyme - that thins the mucus.If she didn't take these measures,the mucus in her lungs would most likely increase her risk of


A) cancer.
B) emphysema.
C) infection.
D) asthma.

E) C) and D)
F) None of the above

Correct Answer

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The enzyme carbonic anhydrase causes


A) carbon dioxide to react with water.
B) carbon dioxide to react with bicarbonate ions.
C) water to react with bicarbonate ions.
D) water to react with hydrogen ions.

E) A) and B)
F) B) and D)

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The first event in inspiration is


A) the diaphragm moves downward and the external intercostal muscles contract.
B) atmospheric pressure forces air into the respiratory tract.
C) decreased intra-alveolar pressure.
D) lung inflation.

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

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A voluntary increase in the rate and depth of breathing is called ______.

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The respiratory control areas are in the


A) cerebral cortex.
B) pons and medulla oblongata.
C) alveoli.
D) hypothalamus and hippocampus.

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

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The visceral and parietal pleural membranes are normally held together by


A) loose connective tissue.
B) dense connective tissue.
C) a thin film of serous fluid.
D) surfactant.

E) All of the above
F) C) and D)

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