Breathing in Flashcards
1
Q
The breathing-in process causes the volume in the chest to ……….and the air pressure in the lungs to ………..until it is slightly lower than the …………
A
increase
decrease
atmospheric pressure
2
Q
As a result of all this air moves
A
air moves down the pressure gradient and rushes into the lungs
3
Q
The diaphragm
A
contracts and flattens, increasing chest volume
4
Q
In addition to the flattening of the diaphragm the external intercostal muscles
the internal intercostal muscles
A
contract, causing the ribcage to move upwards and outwards
relax
