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22 Cards in this Set
- Front
- Back
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What is the arrangement of the muscle fibers in a parallel muscle? |
Parallel to the long axis of the muscle |
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What is the arrangement of the muscle fibers in a convergent muscle? |
Converged on an attachement site and they pull in different directions depending on stimulation |
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What is the arrangement of muscle fibers in a pennate muscle? |
Formed at an oblique angle with the tendon |
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Also called sphincters and are found in entrances of the body |
Circular muscles |
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A rigid moving structure |
Lever
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Each bone is a __________ |
Lever |
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A fixed point |
The fulcrum of a lever |
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Each joint is a __________ |
Fulcrum |
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The function of levers is to change: |
Direction of and applied force (AF) Distance and speed of movement produced by an AF Effective strength of an AF |
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Position in a first-class lever |
Center fulcrum between AF and load |
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Position in a second-class lever |
Center resistance between AF and fulcrum |
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Position in a third-class lever |
Centr applied force between load and fulcrum |
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Most common levers in the body that maximized the speed and distance traveled |
Third-class levers |
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What is the origin of a muscle? |
One fixed point of attachment |
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What is the insertion of a muscle? |
One moving point of attachment |
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Produces body movements |
Muscle |
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A prime mover that produces a particular movement |
Agonist muscle |
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Opposes movement of a particular agonist |
Antagonist muscle |
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Assists a larger agonist and helps start motion or stabilize the origin of an agonist (fixator) |
Synergist muscle |
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The naming of skeletal muscles is based on the description of: |
Location Origin and insertion Fascicle organization Relative position Structural characteristics Action |
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Move the rib cage and position the head and spinal column |
Axial muscles |
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Support the pectoral and pelvic girdles and support limbs |
Appendicular muscles |
