Muscular System
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| Excitability | receiving and responding to stimuli
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| Contractility | force generated to shorten and thicken
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| Extensibility | ability of muscles to be streched
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| Elasticity | Ability of muscle to return to original state
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| Sarkos | Flesh
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| Mys | Muscle
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| Fascia | surrounds and separates each muscle; underlies skin penetrating and separating mucles
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| Aponeurosis | Broad fibrous tissue; attaches muscle to bone or muscle to muscle;
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| Sarcolemma | cell membrane
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| T Tubules | Invaginations that extend from sarcolemma through the muscle fiber
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| Sarcoplasmic Reticulum | Smooth ER; Stores Ca+ ions
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| Myofilaments | Thin-Actin-light; Thick-Myosin-dark the striations of the cell
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| Sarcomere | structural and functional unit of a muscle; separated by Z-lines
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| Z-Lines | Segment of myofibrils between
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| Proteins of the muscle | Actin, myosin
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| Difference between tendon and Aponeurosis | Aponeurosis is broad....obliques and abdominals
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| Muscle fibers | cylindrical ells composing of fibers
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| Z-line to Z-line | Sarcomere
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| Myosin-binding site | structure of actin molecules that interacts w/ crossbridge of myosin
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| Tropomyosin-Troponin | Proteins of actin molecule which are involved in muscle contractions
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| Cross bridge | where they touch together the actin and myosin
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| Motor Unit | one motor neuron and all muscle fibers that it is attached to
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| Motor End Plate | high concentration of muscle fibers mitochondria and nuclei
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| Sliding filament theory | myocin and actin completing the connection for contraction
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| Threshold stimulus | All or none...either muscle contracts or doesn't
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| Tetanus | sustained contractions as a result of continuous stimuli
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| Treppe | tension increases after each contraction
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| Tetany kinds of | complete and incomplete, Treppe
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| Isotonic | Shortening of muscle with the movement of the body part
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| Hypertrophy | Muscles get bigger
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| Isometric | Minimum shortening of muscle with out moving
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Created by:
cborealis2
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