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Upon vigorous exercise, your heart rate increases to 200 beats per minute to supply sufficient oxygen to muscles. Which is responsible for this regulation of the heart rate?
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Upon vigorous exercise, your heart rate increases to 200 beats per minute to supply sufficient oxygen to muscles. Which is responsible for this regulation of the heart rate?

User Bustergun
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6 votes

Answer:

B

Step-by-step explanation:

I got it correct

User Ratatouille
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sinoatrial node i am 100 percent sure thats the correct answer
User Xiaojing
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