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In cardiac muscle, summation would be detrimental because A) the heart would not be able to relax completely. B) the heart wo
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Answer) option C) is correct.

This is because the summation does not happen in heart muscle due to a long refractory period. Refractory period is the time which the heart muscle takes to prepare for the next contraction in between depolarisation and repolarization. Therefore, summation would be detrimental in heart muscle because the heart would not be able to contract.

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