PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which myofilament is composed of the protein myosin?
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Thick
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Thin
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Sarcomeres consist of highly ordered arrays of thick myosin and thin actin filaments along with accessory proteins.
Detailed explanation-2: -An individual sarcomere contains many parallel actin (thin) and myosin (thick) filaments.
Detailed explanation-3: -Most of the cytoplasm consists of myofibrils, which are cylindrical bundles of two types of filaments: thick filaments of myosin (about 15 nm in diameter) and thin filaments of actin (about 7 nm in diameter).
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