The main factor that controls the rate of breathing is..
A.) concentration of carbon dioxide.
If we think about it.. When we breath in oxygen, right away it enters your lungs and turns into carbon dioxide. Well since your lungs need to process oxygen and bring oxygen into the blood stream. Then as soon as the oxygen comes inside (inhale) the oxygen turns into carbon dioxide and you breath it out (exhale) to get a new oxygen load.
Makes sense? lol
Good Luck! :)
Answer:
3
Explanation:
bc I said so lol sksksksksksksksk
Warmup/stretches probably
Answer: what is the question? and how can i help my dad to stop smoking?
Answer:
true
yes because it helps our body to stay healthy
