Microscopic Structure of Skeletal Muscle: Sarcoplasmic Reticulum (SR)

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6 Terms

1
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What are the interconnecting tubules that encase myofibrils?

Sarcoplasmic reticulum (SR)

<p>Sarcoplasmic reticulum (SR)</p>
2
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Where do most tubules run to myofibrils?

parallel

<p>parallel</p>
3
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What are terminal cisterns?

large perpendicular cross channels

<p>large perpendicular cross channels</p>
4
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Other tubules form ______ @ A band - I band junctions

terminal cisterns

<p>terminal cisterns</p>
5
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Function of Sarcoplasmic reticulum (SR)

store calcium ion (Ca2+); critical to contraction of microfibrils

6
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What is the Sarcoplasmic reticulum (SR) critical to?

the contraction of microfibrils