Respiratory System Physiology Set 1

Physiology (Respiratory System ) 1

1 / 25

Which person would be expected to have
the largest A–a gradient?

2 / 25

A person with a ventilation/perfusion
(V/Q) defect has hypoxemia and is treated
with supplemental O2. The supplemental O2
will be most helpful if the person’s predominant V/Q defect is

3 / 25

In a maximal expiration, the total volume
expired is

4 / 25

The pH of venous blood is only slightly
more acidic than the pH of arterial blood
because

5 / 25

A 38-year-old woman moves with her
family from New York City (sea level) to
Leadville Colorado (10,200 feet above sea
level). Which of the following will occur as a
result of residing at high altitude?

6 / 25

Which of the following causes of hypoxia
is characterized by a decreased arterial PO2
and an increased A–a gradient?

7 / 25

A 42-year-old woman with severe
pulmonary fibrosis is evaluated by her
physician and has the following
arterial blood gases: pH = 7.48, PaO2 =
55 mm Hg, and PaCO2 = 32 mm Hg. Which
statement best explains the observed value
of PaCO2?

8 / 25

In the transport of CO2 from the tissues
to the lungs, which of the following occurs in
venous blood?

9 / 25

If an area of the lung is not ventilated
because of bronchial obstruction, the pulmonary capillary blood serving that area will
have a PO2 that is

10 / 25

Which of the following changes occurs
during strenuous exercise?

11 / 25

Hypoxemia produces hyperventilation
by a direct effect on the

12 / 25

Compared with the apex of the lung, the
base of the lung has

13 / 25

A healthy 65-year-old man with a tidal
volume (TV) of 0.45 L has a breathing frequency of 16 breaths/min. His arterial PCO2
is 41 mm Hg, and the PCO2 of his expired air
is 35 mm Hg. What is his alveolar ventilation?

14 / 25

Compared with the systemic circulation,
the pulmonary circulation has a............

15 / 25

Which volume remains in the lungs after
a maximal expiration?

16 / 25

A 49-year-old man has a pulmonary
embolism that completely blocks blood flow
to his left lung. As a result, which of the following will occur?

17 / 25

When a person is standing, blood flow in
the lungs is

18 / 25

Which of the following is the site of highest airway resistance?

19 / 25

A 35-year-old man has a vital capacity
(VC) of 5 L, a tidal volume (TV) of 0.5 L, an
inspiratory capacity of 3.5 L, and a functional residual capacity (FRC) of 2.5 L. What is
his expiratory reserve volume (ERV)?

20 / 25

Which volume remains in the lungs after
a tidal volume (TV) is expired?

21 / 25

Which of the following is true during
inspiration?

22 / 25

A 12-year-old boy has a severe asthmatic
attack with wheezing. He experiences rapid
breathing and becomes cyanotic. His
arterial PO2 is 60 mm Hg and his PCO2 is
30 mm Hg Which of the following statements about
this patient is most likely to be true?

23 / 25

In which vascular bed does hypoxia cause
vasoconstriction?

24 / 25

An infant born prematurely in gestational
week 25 has neonatal respiratory distress
syndrome. Which of the following would be
expected in this infant?

25 / 25

Which of the following lung volumes
or capacities can be measured by
spirometry

Your score is

The average score is 28%

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