Gas Exchange and Partial Pressures Flashcards
1
Q
What is normal air composed of?
A
-Nitrogen
-Oxygen
-Carbon dioxide
2
Q
Where does diffusion occur?
A
From areas of high partial pressure to areas of low partial pressure.
3
Q
What is partial pressure?
A
The amount of each gas within a mixture.
4
Q
What are the percentages and amounts of each gas in normal air?
A
-Nitrogen: 78%=593 mm Hg
-Oxygen: 21%=160 mm Hg
-Carbon dioxide: .04%=.3 mm Hg
5
Q
What is created when oxygen and hemoglobin bind together?
A
Oxyhemoglobin
6
Q
What are some reasons oxygen would release from oxyhemoglobin?
A
-PO2 in the blood drops
-High temperature
-High acidity
-High CO2 levels
7
Q
What substance can oxygen also dissolve into?
A
Plasma
