Muscle system
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| Epimysium | Exterior collagen layer.Separates muscle from surrounding tissue
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| Perimysium | Surrounds muscle fiber bundles (fascicles)
Contains blood vessel and nerve supply to fascicles
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| endomysium | surrounds the individual muscle cells (muscle fibers)Contains capillaries and nerve fibers containing muscle cells.
Contains satellite cells (stem cells) that repair damage
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| Tendon | A flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.
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| Muscle fibers | muscle tissue
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| Myoblast | muscle fibor
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| Sarcoplasm | the cytoplasm of the strained muscle fiber
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| Transverse Tubules | any of the small tubules which run transversely through a striated muscle fiber and through which electrical impulses are transmitted from the sacoplasm to the fibers interior
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| Action Potential | a shot lasting event in which the electrical membrane potential of the cell rapidly rises and falls
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| Myofilaments | filaments of the myofibrils constructed from proteins
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| Thin filaments | a myofilament of the two types making up myofibrils
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| Thick filaments | one of the contractile elements in skeletal, cardiac and smooth muscle fibers
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| sarcoplasmic reticulum | a system of membrane tubules that surrounds muscle fibrils, releasing calcium ions during contraction and absorbing them during relaxation
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| Triad | The junction between t tubules and the sarcoplasmic reticulum in the striated
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| Cisternae | a sac or partially closed space containing body fluid, esp lymph or cerebrospinal fluid
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| sarcomes | One of a group of tumors usually arising from connective tissue.
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| myofibrils | are filaments of the proteins myosin and actin; these filaments slide past one another as the muscle contracts and expands.
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| striated | muscle tissue that has repeating sarcomeres, in contrast with smooth muscle tissue. Specifically, striated muscles are
Skeletal striated muscle
Branchiomeric muscle (embryologically different from skeletal muscle)
Cardiac muscle (heart muscle)
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| Troponin | Troponin is a complex of three regulatory proteins (troponin C, troponin I, and troponin T) that is integral to muscle contraction in skeletal muscle and cardiac muscle, but not smooth muscle.
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| Tropomyosin | s a two-stranded alpha-helical coiled coil protein found in cell cytoskeletons.
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| Active site | a small port in an enzyme where substrate molecules bind and undergo a chemical reaction. This chemical reaction occurs when a substrate collides with and slots into the active site of an enzyme
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| Actn | the most abundant protein in most eukaryotic cells. It is highly conserved and participates in more protein-protein interactions than any known protein
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| Myosin | ATP dependent also know for their muscle contractions. large superfamily of motor proteins that move along actin filaments,
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| Neuromuscular junction | connects the nervous system to the muscular system via synapses between efferent nerve fibers and muscle fibers, also known as muscle cells.
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| sarcolemma | the cell membrane of a striated muscle fiber cell.
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