What happens during a cross-bridge cycle in skeletal muscle?
A) The cross bridge is energized as myosin ATPase activity hydrolyzes ATP.
B) The myosin cross bridge is able to bind with troponin molecule when Ca2+ pulls the troponin-tropomyosin complex aside.
C) The linkage between actin and the myosin cross bridge is broken at the end of the cross-bridge cycle as Mg2+ binds to the cross bridge.
D) The power strokes of all cross bridges are directed toward the periphery of the thick filament.
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Q26: Which statement concerning cross bridges is correct?
A)
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