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26 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the 4 characteristics that allow muscle tissue to perform? |
Excitability Contractibility Extensibility Elasticity |
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Name the 3 types of muscle tissue: |
Cardiac Smooth Skeletal |
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Found only in heart Short, branching (striated) Involuntary Contains intercalated discs |
Cardiac muscle |
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Short fibers Spindle/kayak shaped Found in hollow organs Non-striated Involuntary |
Smooth muscle |
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Long, straight fibers Mostly attached to bones Voluntary Striated |
Skeletal |
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Short fibers Spindle/kayak shaped Found in hollow organs Non-striated Involuntary |
Smooth muscle |
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4 functions of SKELETAL muscle |
Movement Maintain posture/position Stabilize joints Generate heat |
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What is a single skeletal muscle cell called? |
Muscle FIBER |
Multiple nuclei |
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Cytoplasm of a muscle cell |
Sarcoplasm |
Contains large amount of myoglobin- A pigment that holds reserve supply of oxygen in muscle |
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Cell membrane of a muscle cell |
Sarcolemma |
Contain T-Tubules - invaginations that extend into middle of muscle fiber |
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Elaborate NETWORK of membranes Whos function is to store calcium |
Sarcoplasmic Reticulum |
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Individual muscle fiber surrounded by dense connective tissue |
Endomysium |
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Smallest component of a muscle fiber |
Filament |
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What filament is composed of the protein myosin? |
Thick filament |
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What 3 proteins create a thin filament? |
Actin Tropomyosin Troponin |
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Binds to myosin during contractions |
Actin |
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Covers myosin binding sites on action |
Tropomyosin |
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Attached to tropomyosin at rest Binds Ca2+ (calcium ion) during contractions |
Troponin |
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Bundle of many muscle filaments together |
Myofibril |
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Bundle of muscle fibers together |
Fascicle |
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Dense, irregular connective tissue that surrounds each individual fascicles |
Perimysium |
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A bundle of fascicles with similar functions |
Whole muscle |
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A bundle of fascicles with similar functions |
Whole muscle |
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Dense, irregular connective tissue that surrounds the ENTIRE muscle |
Epimysium |
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Functional unit of skeletal muscle contraction Due to myofibril not being long enough |
Sarcomere |
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Site where a motor neuron meets a muscle fiber |
Neuromuscular Junction |
AKA: motor end plate |
