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A muscle contracts more strongly when lifting a 20-pound weight than when lifting a 5-pound weight. This is because more fibers are contracting, not because individual fibers contract harder. a. true b.
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A muscle contracts more strongly when lifting a 20-pound weight than when lifting a 5-pound weight. This is because more fibers are contracting, not because individual fibers contract harder.

a. true
b. false
a. true

User Waldo Bronchart
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The answer to your question is factual
User Chuckj
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