Muscular Sytem-Amoeba Sisters

Which type of muscle tissue is found in the heart and is not under conscious control?

• Skeletal muscle

• Voluntary muscle

• Smooth muscle

• Cardiac muscle

What is the term for the ability of muscle tissue to return to its original length after being stretched?

• Excitability

• Elasticity

• Extensibility

• Contractility

What is the name of the main muscle responsible for a specific movement?

• Insertion

• Agonist

• Origin

• Antagonist

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In the sliding filament model, which protein forms the thick filaments?

• Tropomyosin

• Myosin

• Actin

• Troponin

What happens when calcium ions bind to troponin during muscle contraction?

• Tropomyosin moves away from myosin binding sites

• Tropomyosin blocks myosin binding sites

• ATP is not required

• Myosin heads detach from actin