Lung volumes

Question 1

define tidal volume

Answer 1

volume of air breathed in and out in a single breath

Question 2

normal tidal volume

Answer 2

0.5 L

Question 3

define inspiratory reserve volume (IRV)

Answer 3

Volume of air breathed in by a maximum inspiration at the end of a normal inspiration

Question 4

normal IRV

Answer 4

3.3L

Question 5

define expiratory reserve volume (ERV)

Answer 5

volume of air that can be expeled by a maximum effort at the end of a normal expiration

Question 6

normal ERV

Answer 6

1L

Question 7

Define residual volume (RV)

Answer 7

volume of air remaining in lungs at the end of a maximum expiration 1.2L

Question 8

what is the equation for Inspiratory capacity

Answer 8

Tidal volume + IRV

Question 9

Define inspiratory capacity

Answer 9

volume of air breathed in by a maximum inspiration at the end of a normal expiration

Question 10

normal inspiratory capacity

Answer 10

3.8 L

Question 11

What is the equation for functional residual capacity

Answer 11

ERV + RV

Question 12

Define functional residual capacity

Answer 12

volume of air remaining in lungs at the end of a normal expiration

Question 13

why is functional residual capacity so important

Answer 13

acts as a buffer against extreme changes in alveolar gas levels with each breath

Question 14

normal functional residual capacity

Answer 14

2.2L

Question 15

define vital capacity

Answer 15

volume of air that can be breathed in by a maximum inspiration following a maximum expiration

Question 16

normal Total lung capacity

Answer 16

6L