The function of tropomyosin is to prevent actin and myosin from - when the muscle is at rest.
Correct answer: A. Interacting
- A. Interacting
- B. Separation
- C. Both A an B
- D. None of these
Explanation
Tropomyosin blocks myosin binding sites on actin molecules, preventing cross-bridge formation, which prevents contraction in a muscle without nervous input. The other options are incorrect
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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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