A Comparison Of Inspired and Expired Air Flashcards
1
Q
Oxygen
A
21% to 16%
Why?
Oxygen is absorbed across the gas exchange surface, then used by cells in respiration
2
Q
Carbon Dioxide
A
0.04% to 4%
Why?
Carbon dioxide is made inside respiring cells, and diffuses out across the gas exchange surface
3
Q
Nitrogen (N2)
A
78% to 78%
Why?
Nitrogen is not used by body cells.
4
Q
Water vapour
(H2O)
A
Variable to saturated
Why?
The gaseous exchange surface is moist and some of the moisture evaporates into the air being exhaled.
5
Q
Temperature
A
Variable to warm(body temp)
Why?
The air is warmed as it moves through the respiratory system.
