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1. Cardiac muscles differ from skeletal muscles in that they ________.
 
 
 
 

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2. If cardiac muscle cells were prevented from undergoing aerobic metabolism, they ultimately would ________.
 
 
 
 

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3. Critical Thinking: What would be the drawback of cardiac contractions being the same duration as skeletal muscle contractions?

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4. Critical Thinking: How are cardiac muscle cells similar to and different from skeletal muscle cells?

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