Muscular System
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each of the black spaces below before clicking
on it to display the answer.
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| Antagonist | a muscle whose contraction opposes an action of another muscle
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| Aponeurosis | a broad sheet of fibrous connective tissue that attaches a muscle to another muscle or connective tissue
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| Creatine phosphate | a molecule that stores a small amount of energy in a muscle fiber
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| Insertion | the attachment of a muscle that moves when the muscle contracts
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| Motor Unit | a motor neuron and the muscle fibers that it controls
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| Muscle Tone | the state of slight contraction in a skeletal muscle
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| Myofibril | one of many contractile fibers within a muscle cell
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| Myoglobin | a molecule that stores a small amount of oxygen in a muscle fiber
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| Neurotransmitter | a chemical released by axon tips of neurons that activates a muscle fiber, gland, or another neuron
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| Origin | the attachment of a muscle that remains fixed when the muscle contracts
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| Sarcomere | the smallest contractile unit of a myofibril
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| Tendon | a narrow band of fibrous connective tissue that attaches a muscle to a bone
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| Tetanic Contraction | a sustained muscle contraction
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| Muscle Fiber | a single muscle cell
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