Respiratory Values and Capacities

Question 1

Define TIDAL VOLUME

Answer 1

Amount of air that is inspired/expired at rest

Question 2

Define RESIDUAL VOLUME

Answer 2

Volume of air left in lungs after Maximal Respiration

Question 3

Define VITAL CAPACITY

Answer 3

• Greatest amount of air that can forcibly be exhaled
• After Maximal Inhalation

Question 4

Define INSPIRATORY CAPACITY

Answer 4

• Maximum volume of air inspired
• After resting expiratory level to full inflation

Question 5

Define INSPIRATORY RESERVE VOLUME

Answer 5

• Difference between normal and Maximal Inspiration
• Or amount of extra air inhaled after a forceful inspiration

Question 6

Define EXPIRATORY RESERVE VOLUME

Answer 6

Difference between normal and maximal expiration

Question 7

Define FUNCTIONAL RESIDUAL CAPACITY

Answer 7

• Volume of air remaining in lungs
• At the end of passive expiration
• FRC=ERV+RV

Question 8

Define TOTAL LUNG CAPACITY. What is the EQUATION?

Answer 8

• Total amount of air the lungs can hold
• TCL=VC+RV