PHYSIOLOGY
MUSCLE CONTRACTION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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myofibril, muscle fiber, fascicle, muscle
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muscle, fascicle, myofibril, muscle fiber
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fascicle, sarcomere, muscle, muscle fiber
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myofibril, muscle, fascicle, sarcomere
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Detailed explanation-1: -From smallest to largest, the parts of a skeletal muscle are Myofilament, sarcomere, myofibril, muscle fiber, fascicle, muscle.
Detailed explanation-2: -Answer and Explanation: Of all the answers, the largest structure is the fascicle. Fascicles are made up of muscle fibers and muscle fibers are made up of myofibrils. Myofibrils are made up of myofilaments which would make them the smallest structure in the list.
Detailed explanation-3: -The sarcomere is the smallest functional unit of a skeletal muscle fiber and is a highly organized arrangement of contractile, regulatory, and structural proteins. It is the shortening of these individual sarcomeres that lead to the contraction of individual skeletal muscle fibers (and ultimately the whole muscle).