PHYSIOLOGY
MUSCLE STRUCTURE FUNCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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actin
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myosin
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troponin
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collagen
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Detailed explanation-1: -The I bands contain only thin (actin) filaments, whereas the A bands contain thick (myosin) filaments. The myosin and actin filaments overlap in peripheral regions of the A band, whereas a middle region (called the H zone) contains only myosin.
Detailed explanation-2: -The myofibrils are made up of thick and thin myofilaments, which give the muscle its striped appearance. The thick filaments are composed strands of the protein myosin, and the thin filaments are strands of the protein actin, along with two other muscle regulatory proteins, tropomyosin and troponin.
Detailed explanation-3: -Thin myofilaments consists of actin, troponin and tropomyosin.
Detailed explanation-4: -Myofilaments make up the myofibril. The myofibrils are contractile threads that extend along the length inside the striated muscle fiber.