PHYSIOLOGY
MICROSCOPIC MUSCLE ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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cross bridges
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myofilaments
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microfilaments
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sarcoplasmic reticulum
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Detailed explanation-1: -Each myofibril is a threadlike structure that extends from one end of the muscle fiber to the other. Myofibrils consist of two major kinds of protein fibers: actin and myosin myofilaments.
Detailed explanation-2: -There are two main types of myofilaments: thick filaments and thin filaments.
Detailed explanation-3: -Muscles are composed of myofibrils containing the myofilaments actin and myosin. Under the influence of adenosine triphosphate (ATP), actin and myosin form a contractile compound, actomyosin, which is required for muscle contraction.
Detailed explanation-4: -Myofibrils are made up of two types of protein: 1) Actin myofilaments, and 2) myosin myofilaments. The actin and myosin filaments form the contractile part of the muscle, which is called. the sarcomere.