Question

When we are exercising, our breathing rate and pulse rate will increase. This happens because we need to get more A. carbon monoxide B. carbon dioxide C. nitrogen D. oxygen

anyone missed me.. I think no.. T_T
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Answer 1

Answer:

oxygen

Explanation:

because breathing rate(exercise) requires energy which is 38Atp so we need more o2

Answer 2

Answer:

option d is your answer

Explanation:

hope it helps you...