Define and describe
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| show | overlapping thick and thin filaments
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| actin | show 🗑
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| show | consists of two twisted strands with globular cross-bridges projected outward along the strands
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| show | two proteins associated with the surface of the actin filaments
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| show | layers of dense connective tissue, surround and separate each muscle
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| show | bundles of muscle fibers inside the perimysium
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| perimysium | show 🗑
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| perimysium | show 🗑
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| endomysium | show 🗑
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| show | broad sheet of tendon that connects different skeletal muscles
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| show | bands of collagen fibers that attach skeletal muscles to bones
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| show | epimysium, perimysium, endomysium
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| show | nerve fibers
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| multinucleate | show 🗑
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| sarcolemma | show 🗑
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| show | cytoplasm of a muscle fiber
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| show | form pathways through the muscle fiber. Key role in coordination of the muscle fiber
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| show | bundles of thick and thin filaments
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| myofilaments | show 🗑
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| show | found in thin filaments
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| show | found in thick filaments
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| show | responsible for muscle fiber contraction
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| sarcoplasmic reticulum "SR" | show 🗑
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| terminal cisternae | show 🗑
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| when does muscle contraction begin | show 🗑
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| show | repeating functional units of myofilaments, smallest functional unit of the muscle fiber
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| show | myosin heads of connected thick and thin filaments
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| nueromuscular junction | show 🗑
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| show | nerve cell that controlls a skeletal muscle fiber
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| acetylecholine | show 🗑
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| show | changes in the sarcolemma that trigger the contraction of a muscle fiber
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| synaptic cleft | show 🗑
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| show | the portion of the muscle fiber where the sarcolemma is tightly folded to contain receptors that bind Ach, and where nucei and mitochindria are abundant
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| acetylcholinesterase | show 🗑
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| show | electical impulses in the sarcolemma
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| how do neurons control skeletal muscles | show 🗑
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| latent period | show 🗑
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| twitch | show 🗑
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| contraction phase | show 🗑
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| show | muscle tension falls to resting levels as calcium levels drop, active sites are being covered, and the number of cross-bridges declines
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| show | stores excess energy released by the mitochondria, is present to regenerate ATP from ADP and phosphate
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| show | caused by exotoxin from Clostidium tetani, the toxin inhibits certain inhibitory neurons in the spinal chord, both antagonistic groups of muscles contract and the body becomes rigid
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| show | the immovable end of a muscle
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| insertion | show 🗑
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| contraction | show 🗑
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| show | the muscle in a group of muscles that is doing the majority of the work
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| synergists | show 🗑
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| antagonists | show 🗑
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| show | epicranius, orbicularis oculi, orbicularis oris, buccinator, zygomatigus, platysma
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| chewing muscles | show 🗑
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| show | sternocleinomastoid, splenius capitis, semispinalis
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