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The functional unit of contractile syste...

The functional unit of contractile system in a striated muscle is

A

myofibril

B

sarcomere

C

Z-lines

D

cross bridges

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The correct Answer is:
b
Skeletal muscle is also called striated muscle because the regular arrangement of the myofilaments creates as repeating pattern of light and dark bands. Each repeating unit is a sarcomere, the basic functional unit of muscle.
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