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19 Cards in this Set
- Front
- Back
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What is a sprain?
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TRAUMATIC INJURY TO TENDONS, MUSCLES, OR LIGAMENTS AROUND A JOINT
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Isometric Contraction
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Muscle contracts but there is no movement, muscle stays the same length
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Isotonic Contraction
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Involves movement of the muscle contracting
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sarcoplasmic reticulum
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specialized endoplasmic reticulum of muscle cells
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neuromuscular junction
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where motor neuron comes in close contact w/a skeletal muscle cell
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sarcoplasm
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the nonfibrillar cytoplasm of a muscle fiber
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tetanus
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smooth, sustained muscle contraction resulting from high freq. stimulation
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oxygen debt
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require for 02 after exercise completion;restore cellular chemisty, ATP,myoglobin
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rigor mortis
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no more oxygen;constant contraction;stiff in 3-4 hrs;dying cells release Ca++
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endomysium
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thin CT surrounding individual muscle cell, areolar
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epimysium
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dense sheath of fibrous CT surrounding a single muscle
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perimysium
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CT envelloping bundles of muscle fibers; collagen
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origin
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attaches muscle to immovable bone
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insertion
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attachment to movable bone
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myosin
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Thick Filaments, with myosin heads that bind to tropomyosin to move the actin.
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Actin
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Thin filaments interwoven with tropomyosin and troponin.
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myofilaments
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two kinds; myosin and actin
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sarcolemma
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Cell membrane
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sarcoplasm
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cytoplasm glycogen myoglobin
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