air volume and capacity

Question 1

Vt ?

Answer 1

Tidal volume
volume of air that moves in and out during normal quiet ventilation. around 500ml

Question 2

nspiratory reserve volume (IRV)

Answer 2

amount of air that can be forcely inhaled after normal tidal volume. An extra 3 L can be inspired if the external intercostal muscles are assisted by the accessory muscles for a maximal inspiration (forced inspiration).

Question 3

expiratory reserve volume (ERV)

Answer 3

An extra 1.5 L can be expelled if the internal intercostal and accessory muscles are contracted for a maximal expiration (forced expiration).

3

Question 4

what is the residual volume

Answer 4

the volume of air remaining in the lungs after maximum forceful expiration. around 1L.

Question 5

Vital capacity (VC)

Answer 5

5 L. Maximal breath in to maximal out (ERV + VT + IRV).

Question 6

Total lung capacity (TLC)

Answer 6

6 L. If you breath all the way in you hold about 6 L in your lungs (VC + RV).

Question 7

Inspiratory capacity (IC)

Answer 7

3.5 L. The total amount of air that can be drawn into the lungs after normal expiration (VT + IRV).

Question 8

Functional residual capacity (FRC)

Answer 8

2.5 L. Volume in lungs at end of tidal expiration (RV + ERV).