2 years ago

PLEASE HELP!!!!

Biology

1 answer:

Marizza181 [45]2 years ago

3 0

Answer:

during exercise there is an increase in physical activity and the muscle cells respire more than they do when the body is at rest

Explanation:

the heart rate increases during exercise as well as the rate of breathing, this makes sure that more oxygen is absorbed into the blood and more carbon dioxide is removed from it

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