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25 Cards in this Set
- Front
- Back
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A skeletal muscle is composed of
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skeletal muscle tissue, nervous tissue, blood, and connective tissues.
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Fascia
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dense connective tissue that separates individual skeletal muscles.
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tendon
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is a cordlike structure that consists of dense connective tissue.
3. Tendons connect a muscle to a bone. |
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aponeurosis
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a sheetlike structure composed of dense connective stissue.connects muscle to other muscle
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Epimysium
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is a layer of connective tissue that closely surrounds a skeletal muscle.
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Perimysium
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connective tissue that separates muscles into fascicles.
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fascicle
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. A fascicle is a section of a muscle
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Endomysium
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connective tissue that surrounds individual muscle cells.
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Deep fascia
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is fascia that surrounds or penetrates muscles.
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Subcutaneous fascia
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Subcutaneous fascia is fascia just beneath the skin.
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Subserous fascia
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Subserous fascia is a connective tissue layer of the serous membranes covering organs in various body cavities and lining those cavities.
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single muscle cell.
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A skeletal muscle fiber
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The sarcolemma
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The sarcolemma is the cell membrane of a muscle cell.
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sarcoplasm
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. The sarcoplasm is the cytoplasm of a muscle cell.
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The sarcoplasm contains
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many small nuclei, mitochondria and myofibrils.
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Myofibrils
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are threadlike structures and are located in the sarcoplasm.
Myofibrils play a fundamental role in the muscle contraction mechanism. |
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Thick myofilaments
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Thick myofilaments are composed of myosin.
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Thin myofilaments
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Thin myofilaments are composed of actin
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A sarcomere
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is a repeating pattern of a myofibril.
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Normally, a skeletal muscle fiber contracts only upon stimulation
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motor neuron
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A neuromuscular junction
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. is the site where an axon and muscle fiber meet.
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A motor unit
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is a motor neuron and the muscle fibers it controls
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A synaptic cleft
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separates the membranes of the neuron and the membrane of the muscle fiber.
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Synaptic vesicles
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store neurotransmitters.
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Acetylcholine
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is the neurotrasnmitter that motor neurons use to control skeletal muscle.
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