9. Muscle Tissue
Steps of Muscle Contraction
Multiple Choice
Multiple ChoiceHow does tropomyosin regulate muscle contraction?
A
Tropomyosin binds calcium, changing the confirmation of troponin.
B
Tropomyosin prevents myosin heads from binding to actin in the absence of calcium.
C
Tropomyosin wraps myosin preventing actin from binding in the absence of calcium.
D
Tropomyosin releases calcium during an action potential.
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