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Stapedius

When the thic...

Question

When the thick and the thin filaments pull together, which of the following is TRUE?

A

The Z to Z line unit moves apart.

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B

The myofibril doubles in size.

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C

The muscle loses tone.

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D

The sarcomere gets shorter.

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Solution

The correct option is D
The sarcomere gets shorter.

When the thick and thin filaments are pulled together ,sarcomere shortens and muscle contraction occurs.

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Q. Read the statement regarding myofibril and choose the correct option:
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2. In the center of each A band is an elastic fiber called Z-line.
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