Taking in air is called……
a) inhalation
b) exhalation
c) inspiration
d) both a and c
Taking out air from the lungs is called……
a) inhalation
b) exhalation
c) expiration
d) both b and c
The fluid makes the movement of the lungs (expansion and contraction) easy.
a) mucus
b) pleural fluid
c) blood
d) air
Air moves in when the air pressure in the lungs ……the pressure outside the body.
a) decrease
b) increase
c) equal to
d) lower then
During inspiration the volume of the chest cavity …………and the pressure in the lungs decrease.
a) increase
b) decrease
c)equal
d) higher
During expiration, muscles of the ribs and diaphragm……
a) contract
b) relax
c) equal in size
d) dome shape
