The true statement about muscle contraction is that calcium ions bind to the troponin protein, leading to the exposure of myosin-binding sites on actin filament.
Calcium ions bind to the troponin protein is the true statement regarding muscle contraction. When calcium ions bind to troponin, it causes tropomyosin to shift its position on the actin filament, exposing the myosin-binding sites for muscle contraction. This process is essential for the interaction between actin and myosin during muscle contraction.
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