GENERAL ANATOMY
MUSCLE ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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fascicle, muscle fiber, myofibril, sarcomere, myofilament
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muscle fiber, fascicle, sarcomere, myofibril, myofilament
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sarcomere, muscle fiber, fascicle, myofibril, myofilament
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fascicle, muscle fiber, myofilament, myofibril, sarcomer
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Detailed explanation-1: -myofibril, muscle fiber, filament, fascicle. The smallest unit is the filaments (actin and myosin) that make up sarcomere. Clumps of filaments make up the microfibrils.
Detailed explanation-2: -If we go from outside to inside, the correct muscle order would be epimysium, perimysium, fascicle, endomysium, muscle fibers, sarcolemma, myofibrils, and sarcomeres.
Detailed explanation-3: -Four distinct patterns of fascicles are seen within the whole of the muscle: parallel, convergent, pennate, and circular (Figure 2).
Detailed explanation-4: -Answer and Explanation: A skeletal muscle contains many connective tissue layers that are ordered from the outermost to the innermost, C. Epimysium, perimysium, endomysium. the epimysium covers the whole muscle, the perimysium covers muscle fascicles, and the endomysium covers individual muscle fibers.
Detailed explanation-5: -Depolarisation and calcium ion release. Actin and myosin cross-bridge formation. Sliding mechanism of actin and myosin filaments. Sarcomere shortening (muscle contraction)