biology help!?

[anna]

the total capacity of the lungs is about 1.5 Liters
A. less than vital capacity
B. less than titdal volume
C. more than vital capacity
D. more than titdal volume

During normal breathing the volume of air exchanged is about
A. .1 L
B. .6L
C. 2.5 L
D. 4 L


thanks,
love anna

[Confused]

total capacity= tv+irv+erv+rv

tv is the tidal volume
irv is the inspiratory reserve
erv is the expiratory reserve
rv is the residual volume

so the answer to the first one is both c and d.


the normal amount of air exchanged is about 500ml, so b is the closest answer.