APK2105C PEARSON HW 4: CH 16, 17, 18,
19. EXAM QUESTIONS AND ANSWERS
2026 VERIFIED.
What is the primary anatomical difference that marks the dividing line between the conducting
zone and the respiratory zone of the respiratory tract?
a. the absence of cartilage
b. the presence of smooth muscle and the absence of cartilage
c. the presence of macrophages
d. the thickness of the walls surrounding the air spaces
e. the absence of goblet cells - ANS d. the thickness of the walls surrounding the air spaces
What is the function of ciliated cells in the conducting zone?
a. move macrophages down the conducting zone toward the respiratory zone
b. engulf foreign material that has been trapped within the mucus
c. produce a viscous solution called mucus
d. propel mucus containing trapped particles toward the glottis
e. provide the rigid support that keeps the conducting zone open - ANS d. propel mucus
containing trapped particles toward the glottis
What happens to a dust particle that is too large to stay airborne and land in the alveoli?
a. It lands in the mucocillary ladder, where type II macrophages phagocytize them.
b. It lands in the bronchi, where it is absorbed.
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, c. It lands in the respiratory bronchiole, where it is coughed out.
d. It lands in the mucocillary ladder, where it is moved to the trachea to be exhaled.
e. It lands in the mucocillary ladder and moves to the pharynx to be swallowed. - ANS e. It
lands in the mucocillary ladder and moves to the pharynx to be swallowed.
The difference between what two pressures drives air into and out of the lungs?
a. atmospheric and intrapleural
b. atmospheric and intra-alveolar
c. pulmonary venous and atmospheric
d. intrapleural and intra-alveolar
e. central venous and intracoronary - ANS b. atmospheric and intra-alveolar
What is the volume of air present in the lungs when the lungs are at rest (in between breaths)?
a. zero
b. functional residual capacity
c. total lung capacity
d. tidal volume
e. residual volume - ANS b. functional residual capacity
What does contraction of the diaphragm cause?
a. decrease in the volume of the thoracic cavity, and therefore, a decrease in intra-alveolar
pressure
b. decrease in the volume of the thoracic cavity, and therefore, a decrease in atmospheric
pressure
c. decrease in the volume of the thoracic cavity, and therefore, an increase in intra-alveolar
pressure
d. increase in the volume of the thoracic cavity, and therefore, an increase in intra-alveolar
pressure
e. increase in the volume of the thoracic cavity, and therefore, a decrease in intra-alveolar
pressure - ANS e. increase in the volume of the thoracic cavity, and therefore, a decrease in
intra-alveolar pressure
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19. EXAM QUESTIONS AND ANSWERS
2026 VERIFIED.
What is the primary anatomical difference that marks the dividing line between the conducting
zone and the respiratory zone of the respiratory tract?
a. the absence of cartilage
b. the presence of smooth muscle and the absence of cartilage
c. the presence of macrophages
d. the thickness of the walls surrounding the air spaces
e. the absence of goblet cells - ANS d. the thickness of the walls surrounding the air spaces
What is the function of ciliated cells in the conducting zone?
a. move macrophages down the conducting zone toward the respiratory zone
b. engulf foreign material that has been trapped within the mucus
c. produce a viscous solution called mucus
d. propel mucus containing trapped particles toward the glottis
e. provide the rigid support that keeps the conducting zone open - ANS d. propel mucus
containing trapped particles toward the glottis
What happens to a dust particle that is too large to stay airborne and land in the alveoli?
a. It lands in the mucocillary ladder, where type II macrophages phagocytize them.
b. It lands in the bronchi, where it is absorbed.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 11
, c. It lands in the respiratory bronchiole, where it is coughed out.
d. It lands in the mucocillary ladder, where it is moved to the trachea to be exhaled.
e. It lands in the mucocillary ladder and moves to the pharynx to be swallowed. - ANS e. It
lands in the mucocillary ladder and moves to the pharynx to be swallowed.
The difference between what two pressures drives air into and out of the lungs?
a. atmospheric and intrapleural
b. atmospheric and intra-alveolar
c. pulmonary venous and atmospheric
d. intrapleural and intra-alveolar
e. central venous and intracoronary - ANS b. atmospheric and intra-alveolar
What is the volume of air present in the lungs when the lungs are at rest (in between breaths)?
a. zero
b. functional residual capacity
c. total lung capacity
d. tidal volume
e. residual volume - ANS b. functional residual capacity
What does contraction of the diaphragm cause?
a. decrease in the volume of the thoracic cavity, and therefore, a decrease in intra-alveolar
pressure
b. decrease in the volume of the thoracic cavity, and therefore, a decrease in atmospheric
pressure
c. decrease in the volume of the thoracic cavity, and therefore, an increase in intra-alveolar
pressure
d. increase in the volume of the thoracic cavity, and therefore, an increase in intra-alveolar
pressure
e. increase in the volume of the thoracic cavity, and therefore, a decrease in intra-alveolar
pressure - ANS e. increase in the volume of the thoracic cavity, and therefore, a decrease in
intra-alveolar pressure
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