The Binding of Calcium to the Troponin Complex

question 60

Multiple Choice

The binding of calcium to the troponin complex

• A)disrupts cross-bridges,allowing filaments to slide past each other.
• B)allows tropomyosin to bind actin.
• C)opens ion channels,allowing sodium to rush into the muscle cells.
• D)causes tropomyosin to shift position,exposing myosin bind sites on actin.

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