Question

The functional unit of contactal system in a striated muscle

Answer 1

Striated muscles are also called skeletal muscles. The functional unit of the contractile system in striated muscle is sarcomere. Each sarcomere is made up of thin actin filament and thick myosin filament. These thin and thick filaments give light and dark bands to the striated muscles. When these contractile proteins glide over each other, they cause contraction of muscles.

Thus, the correct answer is 'Sarcomere.'

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