Calcium Ions Initiate Sliding of Filaments in Skeletal Muscles by

question 12

Multiple Choice

Calcium ions initiate sliding of filaments in skeletal muscles by

• A) breaking the actin-myosin cross-bridges.
• B) binding to the troponin complex, which then relocates tropomyosin.
• C) transmitting action potentials across the neuromuscular junction.
• D) spreading action potentials through the T tubules.
• E) reestablishing the resting membrane potential following an action potential.

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