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Question

What are the bands that define the ends of each sarcomere called?

A
Actin
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B
Myosin
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C
Z-Line
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D
Sarcoplasmic Reticulum
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Solution

The correct option is C Z-Line
Z-lines, are found between adjacent sarcomeres. The thinner actin filaments are all bound to the Z-line, which makes up the boundary of the sarcomere.
A sarcomere is thus defined as the muscle unit that is found between Z-lines.

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