Which protein forms the thin filaments of a skeletal muscle sarcomere?
Correct answer: A. Actin
- A. Actin
- B. Myosin
- C. Troponin
- D. Tropomyosin
Explanation
Actin forms the thin filaments, whereas myosin forms the thick filaments. Troponin and tropomyosin regulate access to binding sites but are not the main structural protein of the thin filament.
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About Skeletal and Muscular Systems
The skeletal and muscular systems include bone structure, joints, cartilage, the axial and appendicular skeleton, and the roles of ligaments and tendons. They also cover skeletal muscle organization, the sliding filament mechanism, neuromuscular contraction, and common differences between voluntary skeletal muscle, cardiac muscle and smooth muscle.
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