Lung Volumes and Capacities

Question 1

Volume inspired or expired with each normal breath

Answer 1

Tidal volume (TV) – 500 mL

Question 2

Additional amount of air that can be inhaled AFTER a normal inspiration

Answer 2

Inspiratory Reserve Volume (IRV) – 3500 mL

Question 3

Amount of air that can forcibly be inhaled after a normal tidal volume

Answer 3

Inspiratory Reserve Volume (IRV)

Question 4

Additional amount of air that can be exhale AFTER a normal expiration

Answer 4

Expiratory Reserve Volume (ERV) – 1500 mL

Question 5

Volume that remains in the lungs AFTER a MAXIMAL EXPIRATION and CANNOT be measured by spirometry

Answer 5

Residual Volume – 1200 ML

Question 6

Maximal volume of gas that can be INSPIRED from FRC

Answer 6

Inspiratory Capacity (IC) = TV + IRV

Question 7

Amount of gas in the lungs at the end of a PASSIVE EXPIRATION

Answer 7

Functional Residual Capacity (FRC) = ERV + RV

Question 8

Volume of air that can be forcibly EXPIRED after a MAXIMAL INSPIRATION

Answer 8

Vital Capacity (VC) or Forced Vital Capacity (FRC) = TV+IRV+ERV

Question 9

Amount of air that in the lungs AFTER a MAXIMAL INSPIRATION

Answer 9

Total Lung Capacity = TV+IRV+ERV+RV