Muscle contractions occur when a motor nerve impulse causes ____ release from specialized compartments, that bind to ____, a regulatory protein initiating events that result in sliding of ____ thick filaments along ____ thin filaments. A) Fe⁺⁺; myoglobin; actin; myosin B) Na⁺; troponin C; IGG; actin C) Ca⁺⁺; troponin C; myosin; actin D) Ca⁺⁺; calmodulin; PKC; PLC E) K⁺; Na⁺/K⁺ ATPase; subunit-α; subunit-β

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Muscle contractions occur when a motor nerve impulse causes calcium (Ca2+) release from specialized compartments, that bind to troponin C, a regulatory protein initiating events that result in sliding of myosin thick filaments along actin thin filaments.

Muscle Contractions Occur When a Motor Nerve Impulse Causes ____