Deck 46: Lung Volumes and Airway Resistance

Question 1

Chris Long, a former defensive end for the University of Virginia, has a tidal volume of 0.9 L and a re sp ira tor y rat e o f 12 bre ath s p er m inu te a t re st. His an ato m ic d ea d s pa ce is 0 .2 L . H is pu lm on ar y ve ntila tion at r es t is

A) 8.4 L / m in
B) 10.8 L / m in
C) 10 .6 L / m in
D) 8.2 L / m in
E) 0.7 L

Answer 1

B

Question 2

A person has a func tional residual capac ity of 3 L, a vital capacity of 6 L, and an expiratory re se rve vo lum e o f 1 L . W ha t is th e to tal lu ng ca pa city?

A) 10 L
B) 9 L
C) 8 L
D) 7 L
E) 3 L

Answer 2

C

Question 3

W ith a sp iro m ete r, yo u c an ge t a c linic ally u se fu l m ea su re of a irw ay re sis tan ce fro m

A) FRC
B) VC
C) FEV1
D) FEV1 / VC
E) IRV / VC

Answer 3

D

Question 4

Bronchodilation can be brought about by

A) Stim ula tion of h ista m ine rec ep tor s in the alv eo li
B) Stimulation of histamine receptors in the smooth muscle cells of the bronchi
C) Stimulation of a
D) Stimu lation of þ
E) Stimulation of cholinergic receptors on smooth muscle cells of the bronchi

Question 5

The functional residual capacity is the

A) Volume remaining in the lungs after a normal expiration
B) Volume that can be breathed in after a normal inspiration
C) Difference between inspiratory capacity and inspiratory reserve volume
D) Volume than can be breathed in after a normal expiration
E) Volume remaining in the lungs after a forceful expiration

Question 6

If the normal tidal volume in a person is 0.5 L and the normal pulmonary ventilation is 6 L /min, then the breathing frequency should be

A) 12 m in-1
B) 15 m in-1
C) 30 m in-1
D) 5.5 m in-1
E) 3 m in-1

Question 7

Peak expiratory flow rates for normal individuals are about

A) 6- 11 L m in-1
B) 12 0 L m in-1
C) 120 L s-1
D) 6-11 L s-1
E) 60 L s-1

Question 8

Which of the following cannot be m easured using a spirom eter?

A) FEV1
B) FVC
C) Tidal volume (TV)
D) Vital ca pac ity
E) Res idual volume

Question 9

The inspiratory capacity is the

A) Volume remaining in the lungs after a normal expiration
B) Volume that can be breathed in after a normal inspiration
C) Difference between inspiratory capacity and inspiratory reserve volume
D) Volume than can be breathed in after a normal expiration
E) Volume remaining in the lungs after a forceful expiration

Question 10

The Reynolds number is calculated as

A) 8yl / wr4 6 P
B) Q V /
C) 6 V / 6 P
D) 2 a v q /y
E) wr4 / 8yl

Question 11

The residual volume is the

A) Volume remaining in the lungs after a normal expiration
B) Volume that can be breathed in after a normal inspiration
C) Difference between inspiratory capacity and inspiratory reserve volume
D) Volume than can be breathed in after a normal expiration
E) Volume remaining in the lungs after a forceful expiration

Question 12

Dyna m ic co m pres sion refe rs to

A) Com pression of the airways due to muscular compression of the chest
B) Com pression of the alveoli during forceful expiration
C) Com pression of the pulmonary arteries and veins during forceful expiration
D) Compression of the airways during forceful expiration
E) Loss of positive pressure on the lungs during forceful expiration

Question 13

As the generation number of the airway Increases

A) The size of the airway Increases and the aggregate cross-sectional area Increases
B) The size of the airway decreases and the aggreagate cross-sectional area Increases
C) The size of the airway Increases and the aggregate cross-sectional area decreases
D) The size of the airway decreases and the aggregate cross-sectional area decreases
E) The airways become stiffer

Question 14

The tidal volume is the

A) Volume remaining in the lungs after a normal expiration
B) Volume that can be breathed in after a normal inspiration
C) Difference between inspiratory capac ity and inspiratory reserve volume
D) Volume than can be breathed in after a normal expiration
E) Volume remaining in the lungs after a forceful expiration

Question 15

The m ost likely place for turbulent flow is the

A) Trachea
B) Bronchi
C) Bronchioles
D) Respiratory bronchioles
E) Alv eo li

Question 16

The res ista nc e o f th e a irw ays

A) Increases with Increased flow rates
B) Decreases with Increased flow rates
C) Is independent of flow rates
D) Is lower when flow is turbulent
E) Is o hm ic

Question 17

Turbulent flow

A) N ev er oc cu rs in th e a irw ays
B) Occurs only in the larger airways and bronchi
C) Oc cur s in the resp iratory un its
D) Is e nh an ce d b y sm all d iam ete r of the airw ays
E) Is incr eas ed b y increa sing the vis cos ity

Question 18

The inspiratory reserve volume is the

A) Volume remaining in the lungs after a normal expiration
B) Volume that can be breathed in after a normal inspiration
C) Difference between inspiratory capacity and inspiratory reserve volume
D) Volume than can be breathed in after a normal expiration
E) Volume remaining in the lungs after a forceful expiration

Question 19

Chris Long, a former defensive end for the University of Virginia, is a big person with a functional re sid ua l ca pa city o f 3 L , a v ital c ap ac ity of 6 L an d a n e xp ira tor y res er ve vo lum e o f 1 L . W ha t is his ins pir ato ry c ap ac ity?

A) 10 L
B) 5 L
C) 3 L
D) 4 L
E) 8 L