It is important that your heart goes back to resting level because if it doesn't , it might overwork itself and destroy itself.<span />
A because it is just one pack making uo the wolf population of that one area
PH – depends on the environment the cell that is respiring is in.
Temperature; as it increases, the rate increases…to a point (too hot and enzymes denature!)
Answer:
See the answer below
Explanation:
Person X is feeling a burning sensation in several muscles<u> because of the accumulation of lactic acid due to inadequate oxygen in their system.</u> When oxygen becomes inadequate during exercises, anaerobic respiration takes place to augment the oxygen shortage and this leads to the production of lactic acid which accumulates up in the muscles and gives a burning sensation.

Person Y does not feel any burning sensation in their muscles <u>because oxygen is adequate in their system and they do not need to respire anaerobically.</u> <em>Person X exercise regime must have been more rigorous than that of person Y.</em>