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Structure of Skeletal Muscle

Fundamental r...

Question

Fundamental repeating unit of skeletal myofibrils is

A

Motor unit

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B

Sarcoplasmic reticulum

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C

Sarcomere

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D

Myosin cross bridge

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Solution

The correct option is B Sarcomere
Fundamental repeating unit of skeletal myofibrils is sarcomere. It is the repeating unit between 2 Z lines. It is bordered between Z lines. This sarcomere gives striated appearance to the skeletal muscle.
Thus, the correct answer is 'Sarcomere.'

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C a^{2 +}

for muscle contraction is both sarcoplasmic (endoplasmic) reticulum as well as extracellular fluid in case of
a. Skeletal muscles
b. Smooth muscles
c. cardiac muscles

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