Muscle fibers

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18 Terms

1
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tendon

Connects muscle to bone

<p>Connects muscle to bone</p>
2
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epimysium

a sheath of fibrous elastic tissue surrounding a muscle.

<p>a sheath of fibrous elastic tissue surrounding a muscle.</p>
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perimysium

Connective tissue surrounding a fascicle

<p>Connective tissue surrounding a fascicle</p>
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fascicle

bundle of muscle fibers

<p>bundle of muscle fibers</p>
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endomysium

Connective tissue surrounding a muscle fiber

<p>Connective tissue surrounding a muscle fiber</p>
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sarcolemma

plasma membrane of a muscle fiber

<p>plasma membrane of a muscle fiber</p>
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myofibril

tightly packed filament bundles found within skeletal muscle fibers

<p>tightly packed filament bundles found within skeletal muscle fibers</p>
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neuromuscular junction

point of contact between a motor neuron and a skeletal muscle cell

<p>point of contact between a motor neuron and a skeletal muscle cell</p>
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axon of a motor neuron

• branch of efferent motor neuron

• carries wave of depolarization to muscle

<p>• branch of efferent motor neuron</p><p>• carries wave of depolarization to muscle</p>
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z line

A dark thin protein band to which actin filaments are attached in a striated muscle fiber, marking the boundaries between adjacent sarcomeres.

<p>A dark thin protein band to which actin filaments are attached in a striated muscle fiber, marking the boundaries between adjacent sarcomeres.</p>
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m line

supporting proteins that hold the thick filaments together in the H zone

<p>supporting proteins that hold the thick filaments together in the H zone</p>
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A band

dark area; extends length of the thick filaments

<p>dark area; extends length of the thick filaments</p>
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I band

thin filaments only, light band.

<p>thin filaments only, light band.</p>
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sarcomere

contractile unit of a muscle fiber

<p>contractile unit of a muscle fiber</p>
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sarcoplasm

cytoplasm of a muscle fiber

<p>cytoplasm of a muscle fiber</p>
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muscle filament

The structures of the myocyte that perform contraction

<p>The structures of the myocyte that perform contraction</p>
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belly

thicker, middle region of muscle

<p>thicker, middle region of muscle</p>
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somatic motor neuron

a nerve cell that stimulates the contraction of skeletal muscle fibers

<p>a nerve cell that stimulates the contraction of skeletal muscle fibers</p>