A&P Lect 2 part 4

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A&P Lect 2 part 4
2014-10-05 20:41:23

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  1. patholgoical fractures?
    fractures that occur in bones that are already weakened
  2. epiphyseal fractures?
    fractures that occur in the young at the epiphyseal plate because the plate is weaker than the ligaments holding it together
  3. 3 stages of fracture healing?
    • granulation tissue
    • soft callus
    • hard callus
  4. functions of synovial fluid?
    supply oxygen and nurtients, removes wastes, clean up damaged parts, decrease friction in join movement
  5. bursa?
    fluid filled sac that acts as a ball bearing found between bone muscle, bone-tendon, bone-ligament
  6. how is the joint capsule contructed?
     an outer layer of fibrous connective tissue, an inner layer of synovial membrane
  7. what type of joint has the greatest range motion? least range?
    ball socket- greatest range

    hinge- least range
  8. example of the 6 types of movable joints?
    • balls and socket- hip
    • condyloid- knuckles
    • saddle- base of thumb
    • gliding- wrist bones
    • hinge-elbow
    • pivot- C1 and C2
  9. most important stabilizer of the glenohumeral joint?
    biciptial tendon
  10. what is the nurse-maid's elbow?
    radial head dislocation
  11. anatomy of the hip joint?
    head of femur sits deep in acetabulum, held in place by ilio-, ischio-, and pubo- fermoral ligaments
  12. why is hip disolcation an orthopehdic emergency?
    compromise of blood supply to head of femur because of injury to ligamentum teres
  13. describe meidal and lateral menisci.
    • hyaline catilage cushions between the articular surfaces of the femur and tibia
    • pads act as shock absorbers
  14. function of the anterior and posterior cruciate ligaments?
    to prevent excessive forward or backward movement of the femur on the tibia 
  15. what protects the front of the knee?
    quadriceps, tendon, and patella
  16. anatomy of a muscle cell?
    elongate, multiple nuclei, terminal cisternae wrapped around filament bundles, cell membrane extensions called T tubules running through the cell against the terminal cisternae
  17. anatomy of a sarcomere?
    Z discs of titin, attached to actin filaments that run toward the center of the sarcomere but do not reach it; mysoin filaments in the middle, covering the area that actins leave open, titin strands attaching mysoin ends to the Z disc
  18. What connects the sacromere to the outer covering of the muscle cell?
    strands of the protein dystrophin