The Sarcomere

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Anatomy block 2

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8 Terms

1
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What is a sarcomere?

arrangement of thick and thin filaments that give muscles their striations that run z-disc to z-disc

2
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<p>contains only thin myofilaments, contains z-disc</p>

contains only thin myofilaments, contains z-disc

I bands

3
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<p>contains overlapping thick and thin myofilaments </p>

contains overlapping thick and thin myofilaments

A bands

4
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<p>Where do the thin myofilaments attach at?</p>

Where do the thin myofilaments attach at?

Z-disc

5
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<p>contains only thick myofilaments and central region of A band</p>

contains only thick myofilaments and central region of A band

H zone

6
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<p>where thick myofilaments attach, dark line in middle of H zone</p>

where thick myofilaments attach, dark line in middle of H zone

M line

7
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<p>What narrows during muscular contraction?</p><p>*contracted sarcomere</p>

What narrows during muscular contraction?

*contracted sarcomere

the length of each sarcomere, H zones, I bands

8
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<p>What does not narrow during muscular contraction?</p><p>*contracted sarcomere</p>

What does not narrow during muscular contraction?

*contracted sarcomere

the size of the filaments do not shorten or lengthen, A band, Z disc and M line

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