The Respiratory System: Practice Questions

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Exam
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The conducting passageways of the respiratory system include all of the following structures EXCEPT:

B)
alveoli

2)
Hypoventilation dramatically increases carbonic acid concentration and involves: 2)
_______ A)
irregular breathing B)
extremely fast breathing C)
extremely deep breathing D)
extremely slow breathing E)
intermittent breathing
3)
Which one of the following is NOT true of inspiration:
3)
_______ A)
contraction of the diaphragm muscle helps increase the size of the thoracic cavity B) the decreased gas pressure produces a partial vacuum that forcibly sucks air in C) relaxation of the external intercostal muscles helps increase the size of the thoracic cavity D) air continues to move into the lungs until intrapulmonary pressure equals atmospheric pressure E) increased intrapulmonary volume causes inhaled gases to spread out 4)

Which one of the following is NOT true of the pleurae:
4)
_______ A)
they produce sticky mucus B)
they glide easily against each other but resist being pulled apart C) pleurisy can be caused by decreased secretion of pleural fluid D) they produce a slippery serous secretion E)
they usually cling together
5)
Exchange of both oxygen and carbon dioxide through the respiratory membrane occurs by: 5)
_______ A)
passive transport B)
osmosis C)
facilitated diffusion D)
active transport E)
simple diffusion
6)
The bluish cast that results from inadequate oxygenation of the skin and mucosa is called: 6)

B)
cyanosis
7)
Cilia of the trachea that beat continually propel contaminated mucus: 7)
_______ A)
toward the glottis to be hiccupped out B)
toward the nose to be sneezed out C)
toward the epiglottis to be coughed out D)
toward the lungs to be encapsulated E)
toward the throat to be swallowed or spat out
8)
The molecule that prevents lung collapse by lowering the surface tension of the water film lining each alveolar sac is called: 8)
_______ A)
fibrosin
B)
resorbin
C)
surfactant
D)
lecithin
E)
renin
9)
Emphysema results in all of the following EXCEPT:
9)
_______ A)
expanded barrel chest B)
lung fibrosis C)
enlarged alveoli D)
moon face E)
decreased lung elasticity
10)
The auditory tubes, which drain the middle ear, open into the: 10)

nasopharynx C)

Which one of the following bones does NOT contain paranasal sinuses: 11)

D)
mandible

The lipid molecule critical to lung function that coats the gas-exposed alveolar surfaces is called: 12)
______ A)
lecithin
B)
surfactant
C)
renin
D)
interferon
E)
kinin
13)
The walls of the alveoli are composed largely of:
13)
______ A)
pseudostratified epithelium B)
simple squamous epithelium C)
simple cuboidal epithelium D)
stratified squamous epithelium E)
stratified cuboidal epithelium
14)
The respiratory conducting passageways perform all of the following functions EXCEPT: 14)
______ A)
humidify air B)
allow air to reach the lungs C)
exchange gases D)
warm incoming air E)
purify air
15)
Which one of the following terms does not apply to the nose: 15)
______ A)
nasal septum B)
nasal cavity C)
nasopharynx D)
nostrils E)
external nares
16)
Which of the following functions do cilia of the nasal mucosa perform on contaminated mucus: 16)
______ A)
move the mucus toward the nares to be sneezed out B)
move the mucus toward the pharynx for swallowing C)
move the mucus toward the nasal septum to be absorbed D)
move the mucus toward the mouth to be spit out E)
move the mucus toward the trachea to be coughed out
17)
Which one of the following structures is NOT part of the respiratory zone: 17)
______ A)
primary bronchi B)
alveolar ducts C)...
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