rodriguezthalia188 rodriguezthalia188

04-04-2020
Biology

contestada

What makes heart muscles contract, thereby regulating heart rate?

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Аноним Аноним

04-04-2020

Answer:

Calcium makes heart muscles contract, thereby regulating heart rate.

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emmafinn1300 emmafinn1300

04-04-2020

The answer is Calcium

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