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1
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Select all
that apply
a
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Have high levels of myoglobin
2
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lowering a weight- eccentric isotonic contraction
b
...
lifting a weight- concentric isotonic contraction
3
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A myofibril is a complex organelle composed of bundles of- myofilaments
b
...
The structure separating two neighboring sarcomeres is the- Z disc
d
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A sarcomere, the contractile unit, is a segment of a- myofibril
4
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Ca2+ binding to troponin
b
...
ATP hydrolysis at the myosin head (into ADP and P i)
5
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Skeletal Muscle
i
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long, cylindrical, multinucleate cells
b
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single spindle-shaped (fusiform) uninucleate cells
ii
...
Cardiac Muscle
i
...
branching chains of uni- or binucleate cells
d
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Sarcomeres
ii
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sarcoplasmic reticulum