Lung Volumes

Question 1

At the end of inspiration, what would pleural pressure be?
0 cm h2o
-5 cm h2o
-8 cm h2o

Answer 1

-8cm H2O

Question 2

respiratory capacities are the sum of 2+

Answer 2

respiratory volumes

Question 3

inspiratory reserve volume

Answer 3

the most air you can inhale above tidal volume

Question 4

tidal volume

Answer 4

normal quiet breathing volume

Question 5

expiratory reserve volume

Answer 5

air you can forcefully expel after a tidal breath

Question 6

functional residual capacity

Answer 6

expiratory reserve volume and residual volume (volume leftover in lungs/airways after forceful expiration)

Question 7

residual volume

Answer 7

amount of air left in the lungs/airways after forceful expiration

Question 8

during pregnancy, residual volume, expiratory reserve volume, and functional residual capacity _______, while inspiratory reserve volume and tidal volume _________

Answer 8

RV, ERV, FRC decrease
TV, IRV increase
during pregnancy

Question 9

forced expiratory volume in 1 sec (FEV1)

Answer 9

80% is normal
diagnostic tool
obstructive diseases will lower % (COPD, emphysema)
restrictive diseases will raise %

Question 10

obstructive diseases
_____ airflow
difficulty _______
FEV1 _____, FEV1/FVC ratio ______

Answer 10

reduced airflow - disease of the airways 
difficulty exhaling
FEV1 reduced
FEV1/FVC ratio decreased 
RV increases, IRV decreases

Question 11

restrictive disease
_______ lung volume
difficulty ______
Both FEV1 and FVC are ______

Answer 11

reduced of the lung parenchyma and decreased total lung capacity
difficulty inhaling
both FEV1 and FVC are reduced (ratio is therefore unchanged or elevated)

Question 12

space in the respiratory system other than alveoli- no gas exchange occurs

Answer 12

anatomic dead space

Question 13

alveoli that recieve air but not blood make up the

Answer 13

alveolar dead space

Question 14

physiological dead space is essentially

Answer 14

alveolar dead space

in healthy individuals, physiological dead space is negligible

Question 15

at the end of inspiration, the anatomical dead space air has entered

Answer 15

the lungs

Question 16

the first ___ generation of airways have how many alveoli

Answer 16

the first 16 generations of airway have zero alveoli

therefore no gas exchange

Question 17

minute alveolar ventilation is calculated by

Answer 17

subtracting anatomic dead space volume from tidal volume