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Questions and Answers
Troponin I regulates Ca2+ release to initiate contraction
False
The crossbridge cycle is explained by the Sliding Filament Theory
True
Troponin C regulates Ca2+ release to initiate relaxation
False
The crossbridge cycle is initiated by the binding of Ca2+ to Troponin I
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During diastole, ATP binds to myosin, which can interact with actin
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The power stroke is created by the bending of the actin filament
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Troponin T moves tropomyosin to release its inhibitory effect on contraction
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ATP is hydrolyzed before the myosin head attaches to actin
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The crossbridge cycle consists of only three steps
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Upon Ca2+ stimulation, the troponin complex blocks tropomyosin
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