Multiple Choice
In skeletal muscle contraction, the thin filaments of the sarcomere are primarily composed of which protein?
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8. Protein Function
Skeletal Muscle Contraction
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In skeletal muscle contraction, a skeletal muscle fiber deprived of adequate ATP supplies will most likely:
A
Remain in a sustained contracted (rigor) state because myosin heads cannot detach from actin
B
Show increased calcium reuptake into the sarcoplasmic reticulum because SERCA activity is enhanced without ATP
C
Continue normal contractions because ATP is required only for troponin binding to calcium
D
Relax completely because cross-bridge cycling requires ATP only for myosin binding to actin
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