06.3B1 U6P1 (PART B) Organizational Levels of Skeletal Muscle (BASIC)

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6 Terms

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Skeletal Muscle

An organ made up of many muscle fibers that are bundled into structures called fascicles.

<p>An organ made up of many muscle fibers that are bundled into structures called fascicles.</p>
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Fascicle

A bundle of muscle fibers

<p>A bundle of muscle fibers</p>
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Muscle Fiber

A long cylindrical multinucleate cell; nuclei are just beneath the sarcolemma; sarcolemma is a specialized plasma membrane; many mitochondria provide energy for muscle contraction; contain sarcoplasmic reticulum, T tubules, and myofibrils

<p>A long cylindrical multinucleate cell; nuclei are just beneath the sarcolemma; sarcolemma is a specialized plasma membrane; many mitochondria provide energy for muscle contraction; contain sarcoplasmic reticulum, T tubules, and myofibrils</p>
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Sarcomere

The functional unit of muscle that produces muscular contraction and consists of repeating sections of actin and myosin.

<p>The functional unit of muscle that produces muscular contraction and consists of repeating sections of actin and myosin.</p>
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Myofibrils

The contractile organelles of a skeletal muscle fiber that contain actin and myosin

<p>The contractile organelles of a skeletal muscle fiber that contain actin and myosin</p>
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Myofilaments

The contractile proteins, actin and myosin, of muscle cells

<p>The contractile proteins, actin and myosin, of muscle cells</p>