A. 4%
B. 9%
C. 15%
D. 16%
Check Answer
The correct answer is A. 4%.
When we exhale, the air we breathe out contains about 4% carbon dioxide. This is higher than the concentration of carbon dioxide in the air we inhale, which is typically around 0.04%. The higher concentration of carbon dioxide in exhaled air is due to the fact that our bodies produce carbon dioxide as a waste product during cellular respiration, and we exhale this waste gas as we breathe out.
When we exhale, the air we breathe out contains about 4% carbon dioxide. This is higher than the concentration of carbon dioxide in the air we inhale, which is typically around 0.04%. The higher concentration of carbon dioxide in exhaled air is due to the fact that our bodies produce carbon dioxide as a waste product during cellular respiration, and we exhale this waste gas as we breathe out.
