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

  1. Provides the action potential
  2. Binds with troponin to open up binding sites
  3. Binds to actin filaments’ binding sites
  4. 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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