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Cards In This Set
| Front | Back |
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The bulk of the body's muscle is called _______ muscle.
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Skeletal
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An H-zone contains ____ filaments/ _____ only.
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Thick/myosin
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The M-line contains thick filaments linked by accessory proteins which are also called ______ filaments
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Anchor
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Skeletal muscle is composed of ling cylindrical cells called ____
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Fibers
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The nuclei of skeletal muscles have a striped appearance due to the presence of _____
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Myofibrils
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The light bands are known as ___ bands and the dark bands are known as __ bands
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I and A
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Myofibrils are made up of even smaller structures called ____
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Myofilaments
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Myofilaments are made up of two contractile proteins called ___ and ____
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Actin and myosin
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The actual contractile units of muscle are called ____
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Sarcomeres
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The middle of an I-band is known as a ______
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Z-disc
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At each junction of an A-band or an I-band the sarcolemma indents into the muscle forming a _____
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Transverse tubule (t-tubule)
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T-tubules run deeo into the muscle cell between cross channels called ____ _____ of the smooth ER called the ____ ____
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Terminal cisternae
sarcoplasmic reticulum |
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A ____ is where the SR terminal cisternae abut a T tubule on each side.
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Triad
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Each muscle fiber is enclosed in a delicate areolar connective tissue sheath called the ______
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Endomysium
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Several sheathed muscle fibers are wrapped by a collagenic membrane called a ______
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Perimysium
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