What events occur during contraction of skeletal muscle, Ask an Expert

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What events occur during contraction of skeletal muscle fibers?

Choose 3 answers

A. Myosin pulls actin fibers toward the center of the sarcomere.
B. Calcium (Ca2+) ions are released from the sarcoplasmic reticulum.
C. Sodium (Na+) ions trigger the binding of actin filaments to myosin.
D. ATP (adenosine triphosphate) is pumped out of the muscle cell.
E. Myosin binds to actin filaments in the presence of calcium ions.

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