End of chapter quiz: chapter 10

Question 1

. Which of the following lists the order of structures through
which air will pass during inspiration?
a. nose, pharynx, larynx, trachea, bronchi, bronchioles,
alveoli
b. nose, pharynx, trachea, larynx, bronchioles, bronchi,
alveoli
c. alveoli, bronchioles, bronchi, trachea, larynx, pharynx,
nose
d. nose, pharynx, larynx, bronchi, bronchioles, trachea,
alveoli

Answer 1

a.

Question 2

During acute epiglottitis, the epiglottis swells to several times its
normal size. This would interfere directly with:
a. internal respiration
b. external respiration
c. breathing
d. gas exchange in the alveoli

Answer 2

c.

Question 3

. Which of the following actions follows inhalation?
a. The epiglottis closes.
b. The diaphragm relaxes.
c. Surfactants are released into the alveoli.
d. The diaphragm and intercostal muscles contract.

Answer 3

d.

Question 4

The bronchioles are:
a. kept open by cartilage rings
b. larger than the bronchi
c. located between the bronchi and the alveoli
d. an important site of gas exchange in the lungs

Answer 4

c.

Question 5

. Which of the following components of the respiratory tract
does not contain muscular tissue?
a. trachea
b. bronchioles
c. bronchi
d. alveoli

Answer 5

d.

Question 6

Unlike capillaries in the systemic circuit, in the pulmonary
circuit, ____________ blood enters the capillaries from the
arterioles and ____________ blood leaves the capillaries for the
venules.
a. oxygenated . . . oxygenated
b. oxygenated . . . deoxygenated
c. deoxygenated . . . oxygenated
d. deoxygenated . . . deoxygenated

Answer 6

c.

Question 7

Botulism toxin interferes with the transmission of nerve
impulses (action potentials) to skeletal muscles. This interferes
directly with:
a. external respiration
b. gas exchange
c. cellular respiration
d. breathing

Answer 7

d.

Question 8

During a breathing cycle, as the diaphragm and
intercostal muscles ____________ , the volume of the
pleural cavity ____________ and air moves ____________
the lungs.
a. contract . . . decreases . . . into
b. contract . . . increases . . . into
c. relax . . . increases . . . out of
d. relax . . . decreases . . . into

Answer 8

b.

Question 9

Which of the following has the highest PO2
?
a. alveolar air
b. pulmonary artery
c. interstitial fluid
d. pulmonary vein

Answer 9

a.

Question 10

Smoking tobacco does not cause:
a. asthma
b. chronic bronchitis
c. cystic fibrosis
d. emphysema

Answer 10

c.

Question 11

In the blood, O2 is transported primarily ____________ ,
whereas CO2 is transported primarily ____________.
a. as oxyhemoglobin . . . as carbaminohemoglobin
b. dissolved in plasma . . . as carbaminohemoglobin
c. as oxyhemoglobin . . . as bicarbonate in plasma
d. as oxyhemoglobin . . . dissolved in plasma

Answer 11

c.

Question 12

Which of the following is characterized by loss of elasticity in
the bronchioles and permanently damaged alveoli?
a. bronchitis
b. emphysema
c. asthma
d. pneumonia

Answer 12

b.

Question 13

. Which of the following is an inherited condition characterized
by the production of abnormally thick mucus that can interfere
with air flow within the lungs?
a. asthma
b. emphysema
c. cystic fibrosis
d. congestive heart failure

Answer 13

c

Question 14

. Which of the following will happen when someone holds their
breath?
a. The PCO2
will increase.
b. The PO2
will increase.
c. The H+ concentration will decrease.
d. all of the above

Answer 14

a.

Question 15

Which of the following statements about choking is true?
a. It triggers the cough reflex.
b. It occurs when a foreign particle blocks the alveoli.
c. Partial blockage of the airway always causes death.
d. The cough reflex makes one choke.

Answer 15

a.