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12 votes
During exercise, the heart rate increases. Explain why this increase happen

using ALL the words below.

Carbon Dioxide
Muscle Cells
Energy
Lungs


asked
User Blaze
by
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1 Answer

9 votes

Answer:

During exercise the heart rate increases because more energy is needed to make the blood flow withing your body. Muscle cells already contain a lot of miochondria.

Step-by-step explanation:

answered
User Rhenz
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8.1k points

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