paigek1022 paigek1022

25-04-2018
Biology

contestada

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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bobbycrud bobbycrud

08-05-2018

sinoatrial node i am 100 percent sure thats the correct answer

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timmyholm49 timmyholm49

26-04-2019

Answer:

B

Explanation:

I got it correct

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