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Muscular System vocab
Question | Answer |
---|---|
Golden Rules | all muscles cross at least one joint; bulk of the muscles lie proximal to the crossed joint; all muscles have at least 2 attachments:origins & insertions; all muscles can only pull (never push; during contraction, insertion moves toward the origins |
Antagonist | muscle that opposes a prime mover |
Membrane skeletal muscle | Muscle fiber: sarcolemma; fascicle: perimysium; muscle body: epimysium |
Prime mover | muscle responsible for a particular body movement (agonist) |
Synergists | muscles that assists the action of a prime mover |
Origin | end of a muscle that attaches to a relatively immovable part |
Insertion | end of muscle attached to a movable part |
skeletal muscle composition | myofilament-myofibril-muscle fibers (cell)-fascicle-muscle body |
Functions of skeletal system | generate heat; produce body movements; stabilize joint; maintain posture |
Motor Neuron | neuron that transmits impulse from central nervous system to an effector |