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VARVARA [1.3K]
4 years ago
5

Upon vigorous exercise, your heart rate increases to 200 beats per minute to supply sufficient oxygen to muscles. Which is respo

nsible for this regulation of the heart rate?
Biology
2 answers:
Radda [10]4 years ago
3 0
Sinoatrial node i am 100 percent sure thats the correct answer
Len [333]4 years ago
3 0

Answer:

B

Explanation:

I got it correct

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