C. because stimuli is how your body responds to something, and in this case, someone's heart rate increases WHEN their blood oxygen drop. Do you see how it responds? ;-)
Most of the metabolic work is in the:
Cell Body
I have a runny nose and things are dirty.
In cells, hydrogen peroxide is converted to water and oxygen through the activity of
<span>= ENZYMES</span>
Answer:
D. The energy is used by organisms for life functions or is lost as heat.
Explanation: