Muscular System
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Tendon | connective tissue that surrounds each muscle
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| Aponeuross | fibourous sheets
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| Myofibrils | abundant parallel , thread-like structures.
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| Myosin | Protein that causes muscle contraction.
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| Actin | Protein that shortens muscle fibers.
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| Sacromeres | structural and functional unit of a myofibril.
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| Neurotransmitters | Chemical that an axon end secretes.
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| Motor Neurons | Neuron that conducts impulses.
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| Neuromuscular Junction | Synapse between a motor neuron and a skeletal muscle fiber.
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| Acetylcholine | a type of neurotransmitter
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| sliding filament model | muscles shorten, pulling on muscle ends
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| ATPase | enzymes that transfer the energy.
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| Acetylcholinesterse | Enzymes that catalyze breakdown
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| Creatine phosphate | molecule in muscle that stores energy
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| Myoglobin | Oxygen storing pigment in muscle tissue
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| Lactic Acid Threshold | a shift in metabolism
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| Oxygen Debt | amount of oxygen required by muscle cells
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| Threshold Stimulus | stimulation level that must be reached.
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| Twitch | brief contraction of a muscle fiber followed by relaxation
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| muscle tone | on going contraction of fibers.
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| Isometric | contraction that changes muscle length
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| Levers | mechanical device
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| Origin | end of muscle that attachments to unmovable parts.
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| insertion | end of muscle attached to movable parts
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| Agonist | a muscle that causes an action
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| Synergists | a muscle that assists the action of agonists
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| prime mover | muscle that provides most of the force for body movement
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| antagonist | a muscle that opposes an action
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Created by:
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