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NSCA Personal Trainer Exam Prep

Category - NSCA

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What is the function of calcium in the muscle stimulation process?

Provides the action potential
Binds with troponin to open up binding sites
Binds to actin filaments’ binding sites
Conducts the electrical impulse along the myofibril

Explanation

Answer: B - During muscle stimulation, calcium binds with troponin, which subsequently shifts the tropomyosin off the binding sites, freeing them up for the myosin cross-bridges to attach themselves.

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