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:
a substance that provides nourishment essential for growth and the maintenance of life. Examples include proteins, fats, carbohydrates, vitamins, and minerals.
Explanation:
These are the dictionary definitions so i would recomend paraphrasing. Hope this helps
Answer:
<em> use of illegal drugs, prescription drugs, alcohol, and tobacco and misuse of prescription</em>
Explanation:
<em>ill say its answer a</em>
