muscles

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Author:
apvg1997
ID:
309994
Filename:
muscles
Updated:
2015-10-21 20:04:28
Tags:
muscles
Folders:
muscles
Description:
muscles
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  1. skeletal muscle
    • 40-50% of of total body mass
    • long, unbranched fiber
    • multinucleate
    • striations
    • fast rates of contraction
    • it can be controlled bu us
  2. striations
    stripes
  3. skeletal muscle
  4. cardiac muscle
    • found only in heart
    • it has intercalated disks
    • short, branching fibers 
    • slower rates of contraction
    • involuntary muscle type
  5. cardiac muscle
  6. where is smooth muscle found?
    within the walls of many hollow organs specially in the digestive system

    stomach, esophagus, and large/small intestines
  7. smooth muscle
    • short, cigar-shaped cells
    • mononucleate
    • no striation
    • very slow rate of contraction
    • involuntary
  8. smooth muscle
  9. where are most flexors located?
    on the anterior of the body
  10. where are most extensors located?
    posterior
  11. where are most adductors located?
    medial
  12. where are most abductors located?
    lateral
  13. flexion
    movement that decreases the angle of a joint and lesses the distance between bones that lie on either side of the join
  14. extension
    movement that increases the angle at a joint and increases the distance between bones that lie on either side of the joint.
  15. if an angle of extension is over 180 degrees is called what?
    hypoextensions
  16. abduction
    movement of a limb  away from the midline (generally along a frontal plane) Splaying or fanning out the toes or fingers is also an abduction
  17. adduction
    movement towards  the midline
  18. rotatin
    movement of a bone around it longitudial axis
  19. circumduction
    a combination of flexion, extension, abduction, and adduction that produces a circular motion of a body limb, usually around a ball and socket joint
  20. pronation
    movement of the palm of the hand from anterior to posterior (PALM DOWN)
  21. supination
    PALM UP
  22. inversion
    movement of the sole of the foot medial
  23. eversion
    movement of the sole of the foot lateral
  24. dorsiflexion
    bending of the ankle joint dorsally (standing on one's heels)
  25. plantarflexion
    flexing foot downward (standing on one's toes)
  26. tendons
    cords of dense (fibrous) irregular connective tissue that connect muscles to bones
  27. belly (gaster)
    muscle cells (fibers) are clustered in this region
  28. 2 point of attachment in muscles
    origin and insertion
  29. origin
    least movement point of attachment of a muscle
  30. insertion
    most moveable point of attachment of a muscle
  31. insertion point will always what?
    have a tendancy to move towards the origin
  32. endomvsiurm
    a connective tissue sheath that covers muscle cells
  33. fascicles
    groups of muscles
  34. perimysium
    connective tissue that surround fascicles
  35. epimysium
    connective tissue sheath that surrounds grouped fascicles

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