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Bio 223 S.G. 7

Gross Anatomy of the Muscular System (Part 1-Axial)

QuestionAnswer
Muscle Fiber The basic functional unit of skeletal muscle, the same as a muscle cell.
Endomysium A layer of connective tissue that encloses each fiber.
Perimysium A layer of connective tissue that encloses each muscle fascicle (fibers organized into bunches).
Epimysium A layer of connective tissue that encloses each whole muscle.
Tendons Cordlike dense regular connective tissue that that attaches skeletal msucles to the bones.
Aponeuroses Membranous sheets that attach skeletal muscles to the bones.
Origin When an action occurs, this bony attachment remains fixed or stationary.
Insertion The bony attachment that moves when an action occurs.
Prime movers (Agonists) A muscle that directly brings about a specific action.
Antagonists A muscle that directly opposes a specific action.
Synergists "Working together". Muscles that promote or assist in a specific action, or by reducing unnecessary movements while the action is performed.
Fixators A special class of synergists, these muscles stabilizes joints or muscles origins so prime movers can act more efficiently.
Created by: AmericanDame105
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