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 emmafinn1300
  • 04-04-2020
The answer is Calcium
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