Module 11 ML-2 Flashcards
Why does partial pressure of oxygen drop from atm to alv?
- o2 is always moving into pulomonary capillaries
-o2 mixes with water vapor
-o2 mixes with old air
Why does partial pressure of co2 drop from alv to atm
-co2 is always entering alveoli from pulomnary capillaries
-co2 is exhaled into atm that contains very little co2
atm pressure of o2
160 mmhg
atm pressure of co2
0.3 mmhg
alv pressure of o2
105 mmhg
alv pressure of co2 40
mmhg
pressure of o2 in oxygeneated blood
100 mmhg
pressure of co2 in oxygenated blood
40 mmhg
pressure of o2 in deoxygenated blood
40 mmhg
pressure of co2 in deoxygenated blood
46 mmhg
Factors that vary alveolar gas pressures
-po2 of inspired air
-rate of alveolar ventiliation
-rate of metabolism
How does alveolar pressure change in inspired air
po2 decreases (760-380)
Hypovntiliation
producing co2 faster than echaling it; accumulating in the body
Hyperventilation
blowing off co2 faster than producing it
Increased metabolism
decreases p02 and increase co2
