Why Would Cardiac Muscles Have Longer Refractory Periods Than Skeletal

Why would cardiac muscles have longer refractory periods than skeletal muscles.Choose the best answer?

A) to preserve the normal rhythm of the heart and prevent fatigue
B) the muscle types contain different contractile proteins
C) skeletal muscle is autorhythmic
D) skeletal muscles have prolonged calcium influx
E) cardiac muscle is not dependent on aerobic respiration to produce ATP

Correct Answer:

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