22. Lung Function Flashcards
1
Q
What are the partial pressures of oxygen and CO2 at rest?
A
O2: 100 mmHg
CO2: 40 mmHg
2
Q
What are the two separate blood supplies to the lungs?
A
Pulmonary
Bronchial - brings blood to lung parenchyma
3
Q
How much does the volume of blood vary by during exercise?
Why?
A
Rises from 75 mL at rest to 150-200 mL during exercise
Due to recruitment of new capillaries secondary to an increase in pressure and flow
4
Q
Why does the gas pressure gradient need to be much larger for O2 than CO2?
A
CO2 is more diffusible
