A) cross bridge
B) my of fibril
C) Z-band
D) sarcomere
Correct Answer: D
Solution :
Sarcomere is the portion of myofibril that lies between two successive Z-disc. When the muscle fibre is contracted the length of the sarcomere is about 2 micrometer. At this length the actin filaments completely overlap the myosin filament. At this length the muscle is capable of generating its greatest force of contraction.
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