expiration Flashcards
what type of process is expiration
a passive process
what happens to the diaphragm in expiration
it relaxes and moves up into a curved position
what happens to external intercostal muscles in expiration
external intercostal muscles relax
what happens to ribcage in expiration
the ribcage moves down and in
what happens to the pressure in the thorax in expiration
volume inside thorax increases above atmospheric pressure
how does air move out of lungs in expiration
from a high to low pressure (along a pressure gradient)
what happens to the internal intercostal muscles during forced expiration
they contract
what happens to the ribcage during forced expiration
it is pulled further down and in
what happens to external intercostal muscles in forced expiration
they relax
