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Muscular System

TermDefinition
Epimysium Exterior collagen layer; separates muscle from surrounding tissue
Perimysium Surrounds muscle fiber bundles
Endomysium surrounds individual muscle cells (muscle fibers)
Tendon a fibrous connective tissue which attaches muscle to bone.
Muscle Fibers a muscle cell
Myoblast a type of embryonic progenitor cell that differentiates to give rise to muscle cells
Sacroplasm the cytoplasm of striated muscle cells
Transverse Tubules a cavity formed in the plasma membrane in the skeletal system
Action Potential the change in electrical potential associated with the passage of an impulse along the membrane of a muscle cell or nerve cell.
Myofilaments are the filaments of myofibrils constructed from proteins
Thin Filaments filament that contain actin
Thick Filaments filament that contain protein myosin
Sarcoplasmic Reticulum is a specialized type of smooth ER that regulates the calcium ion concentration in the cytoplasm of striated muscle cells.
Triad is the structure formed by a T tubule with a sarcoplasmic reticulum on each side
Cisternae a flattened membrane disk that makes up the Golgi apparatus.
Sarcomeres a structural unit of a myofibril in striated muscle
Myofibrils any of the elongated contractile threads found in striated muscle cells.
Striated muscle tissue in which the contractile fibrils in the cells are aligned in parallel bundles
Troponin a globular protein complex involved in muscle contraction
Tropomysin a protein involved in muscle contraction
Active Site a region on an enzyme that binds to a protein or other substance during a reaction
Actin a protein that forms (together with myosin) the contractile filaments of muscle cells,
Myosin a fibrous protein that forms (together with actin) the contractile filaments of muscle cells
Neuromuscular Junction the site of communication between motor nerve axons and muscle fibres
Created by: Sparky015