PHYSIOLOGY
MUSCLE CONTRACTION
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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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Myoglobin
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Titan
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Detailed explanation-1: -The bipolar thick filament is formed of approximately 300 myosin molecules and their associated proteins (Craig & Offer, 1976; Luther, Munro, & Squire, 1981). It has a strictly uniform dimension of 1.6 µm in length and 15 nm in diameter, which is independent of the type of muscle fiber (Huxley, 1963).
Detailed explanation-2: -Introduction. Myosin filaments (also called thick filaments) are key components of muscle and non-muscle cells.
Detailed explanation-3: -This is called the sarcomere (Figure 1d) and it represents the main functional repeating unit of the myofibril. The sarcomere is approximately 2–3 m in length, and consists of overlapping parallel arrays of actin [thin] filaments and myosin [thick] filaments.