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Muscle system

TermDefinition
Epimysium Exterior collagen layer.Separates muscle from surrounding tissue
Perimysium Surrounds muscle fiber bundles (fascicles) Contains blood vessel and nerve supply to fascicles
endomysium surrounds the individual muscle cells (muscle fibers)Contains capillaries and nerve fibers containing muscle cells. Contains satellite cells (stem cells) that repair damage
Tendon A flexible but inelastic cord of strong fibrous collagen tissue attaching a muscle to a bone.
Muscle fibers muscle tissue
Myoblast muscle fibor
Sarcoplasm the cytoplasm of the strained muscle fiber
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
Action Potential a shot lasting event in which the electrical membrane potential of the cell rapidly rises and falls
Myofilaments filaments of the myofibrils constructed from proteins
Thin filaments a myofilament of the two types making up myofibrils
Thick filaments one of the contractile elements in skeletal, cardiac and smooth muscle fibers
sarcoplasmic reticulum a system of membrane tubules that surrounds muscle fibrils, releasing calcium ions during contraction and absorbing them during relaxation
Triad The junction between t tubules and the sarcoplasmic reticulum in the striated
Cisternae a sac or partially closed space containing body fluid, esp lymph or cerebrospinal fluid
sarcomes One of a group of tumors usually arising from connective tissue.
myofibrils are filaments of the proteins myosin and actin; these filaments slide past one another as the muscle contracts and expands.
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)
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.
Tropomyosin s a two-stranded alpha-helical coiled coil protein found in cell cytoskeletons.
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
Actn the most abundant protein in most eukaryotic cells. It is highly conserved and participates in more protein-protein interactions than any known protein
Myosin ATP dependent also know for their muscle contractions. large superfamily of motor proteins that move along actin filaments,
Neuromuscular junction connects the nervous system to the muscular system via synapses between efferent nerve fibers and muscle fibers, also known as muscle cells.
sarcolemma the cell membrane of a striated muscle fiber cell.
Created by: Legendz