PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which myofibril is a large bundle of proteins with contractile heads sticking out all throughout the bundle?
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Myosin
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Actin
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Troponin
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Tropomyosin
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Explanation:
Detailed explanation-1: -Each myofibril is organized as a chain of contractile units called sarcomeres, which are responsible for the striated appearance of skeletal and cardiac muscle.
Detailed explanation-2: -They are bound together by perimysium, a sheath of connective tissue, into bundles called fascicles, which are in turn bundled together to form muscle tissue. Myocytes contain numerous specialized cellular structures which facilitate their contraction and therefore that of the muscle as a whole.
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