Muscle Contractions Occur When a Motor Nerve Impulse Causes Ca²⁺

question 6

Multiple Choice

Muscle contractions occur when a motor nerve impulse causes Ca²⁺ release from specialized compartments.To which regulatory protein does Ca²⁺ bind to initiate events that result in sliding of myosin thick filaments along actin thin filaments?

• A)myoglobin
• B)calmodulin
• C)troponin C
• D)Na⁺/K⁺ ATPase