bio question~~urgent!!! help please~~

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Which of the following statements BEST describes the strength of cardiac muscle contraction? It is
Decreased when extracellular Ca is increased
Increased when extracellular Ca is increased
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stickto said:
Which of the following statements BEST describes the strength of cardiac muscle contraction? It is
Decreased when extracellular Ca is increased
Increased when extracellular Ca is increased
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Increased when extracellular Ca is increased...need calcium for muscle contraction
 
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