Pathophys quiz 2 Pulmonary Flashcards
(83 cards)
Ventilation
exchange of air between the atmosphere and alveoli (difference in pressure if created by respiratory muscles)
Flow=
Change in pressure / resistance
Flow is greatest if the difference in gas pressure is _____ and resistance is ______
high, low
Boyles law
At constant temperature, the pressure of a gas varies inversely with its volume
P1V1=P2V2
If pressure in the lungs goes down, volume goes______ and if pressure in the lungs goes up, volume goes ______
up , down
Inspiration
Palv < Patm
Expiration
Palv > Patm
for every ___ units of O2 you intake, you expel ____ units of CO2
10, 8
Palv when exhaling
positive (creates pressure to force air out)
Palv when inhaling is
negative
Palv at the end of both inhaling and exhaling is
0, no air movement
Alveolar ventilation
total volume of fresh air entering the alveoli per minute
Tidal Volume
Total amount of air that we inhale and exhale
Inspiratory reserve volume
the extra air we can breath in past normal breathing
expiratory reserve volume
the extra air we can breath out past normal breathing
residual volume
the air we can not breath out (why the Heimlich maneuver works)
at what % of saturated hemoglobin do you have to breath?
65%
How do low temps affect how Hb holds onto O2?
- Metabolism slows so O2 demand is less
- Hb holds onto O2 tighter
How do high temps affect how Hb holds onto O2? (fever)
Hb drops off O2 faster
How do high pH affect how Hb holds onto O2?
Hb holds onto O2 tighter
How does low pH affect how Hb holds onto O2?
Hb lets go of O2 easier
How does high 2, 3 DPG (produced by glycolysis) affect how Hb holds onto O2?
Hb lets go of O2 easier
How do low 2, 3 DPG (produced by glycolysis) affect how Hb holds onto O2?
Holds onto O2 tighter
Hypoxemia
lack of oxygen in the blood