lab quiz respiratory Flashcards
what direction does air move when pressure decreases in the lungs?
in
what muscles are needed for normal inspiration? forced inspiration?
diaphragm
abdominals and int. intercostals
why do we not need muscles for expiration?
because its a recoil and its passive
TV?
tidal volume .5L/breath
FVC
max amount of air moves across the mouth TV x RR
RV
left of air in the lungs
FEV1.0
how much air a person can expel in one second
How do you calculate tidal ventilation
L/Breath
how do you calculate alveolar ventilation
Va= (TV-PV) x RR-volume left in conductivity airways
what is the difference between tidal and alveolar ventilation? Which number should be smaller?
Tidal enters the lungs with each breath and alveolar is how much is actually being used. Alveolar is smaller because of the dead space.
Were the glass slides easier to pull apart when wet or dry and how does this relate to pleural membranes?
they are harder to pull apart when they are wet but it slides faster. The fluid in the plural membrane makes it smoother and the plural membrane makes it smoother and causes the pressure gradient.
What information is from the FEV1.0/FVC ratio? What does a low ratio indicate?
the forced volume expelled in one second versus the total capacity. A low ratio would indicate a respiratory problem such as asthma
What effect did exercise have on TV?
it increased TV and RR
