GMS6402 PULMONARY FINAL EXAM QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
What is Atmospheric O2?
160 mmHg
What is Inspired O2?
150 mmHg
What is Alveolar O2?
100 mmHg
What is Arterial O2 (PaO2)?
100 mmHg
What is Arterial CO2 (PaCO2)?
40 mmHg
What is the formula for compliance?
C = deltaV / deltaP
change in lung volume/ change in pressure
The vast majority of the total surface area of the lung is found in the
alveoli
All of the following can be measured via spirometry EXCEPT: tidal volume, vital
capacity, functional residual capacity, inspiratory capacity, expiratory reserve
volume
Functional residual capacity
,Briefly describe how the radii of the various tubes change as we move from the
trachea to the alveoli
The radii of the tubules decrease due to shredding of epithelial cells. Conducting zones
(g0-16) are surrounded by columnar or cuboidal epithelia, thick layers of cartilage, and
smooth muscle. Respiratory zones (g17-23) are surrounded by type I and II epithelia.
The absence of columnar/cuboidal epithelia, cartilage and smooth muscle results in a
much smaller radius.
What is the Transpulmonary pressure if pleural pressure is -7 cm H2O and
alveolar pressure is -3 cm H2O?
+4 cm H2O
A lung compliance test indicates that a 3 cm H2O change in thanspulmonary
pressure generates a 0.9 L change in lung volume. What is this patient's lung
compliance?
0.3 L air/cm H2O
Airway resistance across a set of airways is lowest under which of the following
conditions?
-airway radius is large and the length of the tube is large
-airway radius is large and the length of the tube is small
-airway radius is small and airways are in series.
-airway radius is small and airways are in parallel.
-airway radius is large and gas viscosity is increased
airway radius is large and the length of the tube is small
, As the lungs fill with air and we move from a low lung volume to higher lung
volumes, airway resistance will
decrease exponentially
What is the typical Tidal Volume?
normal breathing, 0.5 L
What is the typical expiratory reserve volume?
air expelled after normal tidal volume expiration, 2L
What is the residual volume?
air that remains after maximal expiration, 1.2L
What is the forced vital capacity?
air which can be forcibly exhaled from the lungs after taking the deepest breath
possible, 5L
What is the Vital capacity?
air that is exhaled after maximal inspiration, 5L
What is total lung capacity?
max volume the lungs can be expanded, 6L
What is the functional residual capacity?
air left in lungs below tidal, 2.5L
What is the inspiratory reserve volume?
air that can be inhaled after tidal, 2.5L
What is the inspiratory capacity?
air that can be drawn into lungs after normal expiration (tidal + above tidal), 3L
What is an obstructive lung disease?
ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
What is Atmospheric O2?
160 mmHg
What is Inspired O2?
150 mmHg
What is Alveolar O2?
100 mmHg
What is Arterial O2 (PaO2)?
100 mmHg
What is Arterial CO2 (PaCO2)?
40 mmHg
What is the formula for compliance?
C = deltaV / deltaP
change in lung volume/ change in pressure
The vast majority of the total surface area of the lung is found in the
alveoli
All of the following can be measured via spirometry EXCEPT: tidal volume, vital
capacity, functional residual capacity, inspiratory capacity, expiratory reserve
volume
Functional residual capacity
,Briefly describe how the radii of the various tubes change as we move from the
trachea to the alveoli
The radii of the tubules decrease due to shredding of epithelial cells. Conducting zones
(g0-16) are surrounded by columnar or cuboidal epithelia, thick layers of cartilage, and
smooth muscle. Respiratory zones (g17-23) are surrounded by type I and II epithelia.
The absence of columnar/cuboidal epithelia, cartilage and smooth muscle results in a
much smaller radius.
What is the Transpulmonary pressure if pleural pressure is -7 cm H2O and
alveolar pressure is -3 cm H2O?
+4 cm H2O
A lung compliance test indicates that a 3 cm H2O change in thanspulmonary
pressure generates a 0.9 L change in lung volume. What is this patient's lung
compliance?
0.3 L air/cm H2O
Airway resistance across a set of airways is lowest under which of the following
conditions?
-airway radius is large and the length of the tube is large
-airway radius is large and the length of the tube is small
-airway radius is small and airways are in series.
-airway radius is small and airways are in parallel.
-airway radius is large and gas viscosity is increased
airway radius is large and the length of the tube is small
, As the lungs fill with air and we move from a low lung volume to higher lung
volumes, airway resistance will
decrease exponentially
What is the typical Tidal Volume?
normal breathing, 0.5 L
What is the typical expiratory reserve volume?
air expelled after normal tidal volume expiration, 2L
What is the residual volume?
air that remains after maximal expiration, 1.2L
What is the forced vital capacity?
air which can be forcibly exhaled from the lungs after taking the deepest breath
possible, 5L
What is the Vital capacity?
air that is exhaled after maximal inspiration, 5L
What is total lung capacity?
max volume the lungs can be expanded, 6L
What is the functional residual capacity?
air left in lungs below tidal, 2.5L
What is the inspiratory reserve volume?
air that can be inhaled after tidal, 2.5L
What is the inspiratory capacity?
air that can be drawn into lungs after normal expiration (tidal + above tidal), 3L
What is an obstructive lung disease?
