The sliding filament theory involves
Correct answer: A. Actin and myosin
- A. Actin and myosin
- B. Tropomyosin only
- C. Troponin only
- D. Collagen
Explanation
Muscle contraction involves sliding of actin (thin) filaments past myosin (thick) filaments.
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About Muscle Contraction
Muscle contraction is explained by the sliding filament model, in which myosin heads pull actin filaments within sarcomeres using ATP. The topic covers calcium, troponin, tropomyosin, the neuromuscular junction and relaxation, with attention to how filament length stays almost constant while the sarcomere shortens.
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