When calcium is released inside a muscle cell, what does it bind to? actin troponin tropomyosin myosin

When calcium is released inside a muscle cell, what does it bind to?
actin
troponin
tropomyosin
myosin

 
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Which of the following is involved in the power stroke? tropomyosin myosin myofibrils Z lines

Which of the following is involved in the power stroke?
tropomyosin
myosin
myofibrils
Z lines

 
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Myosin molecules form what part of the sarcomere? thin filament actin thick filament tropomyosin

Myosin molecules form what part of the sarcomere?
thin filament
actin
thick filament
tropomyosin

 
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Z lines define the edges of which of the following? sarcomeres myofibrils cross-bridges myosin

Z lines define the edges of which of the following?
sarcomeres
myofibrils
cross-bridges
myosin

 
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