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5 Written questions

5 Matching questions

  1. types of bone (6)
  2. Bone cells (3)
  3. Repair of fractures 1/2
  4. osteogenesis
  5. osteon
  1. a cylinder shaped structural unit in compact bone
  2. b combined action of osteoblasts & osteoclasts to mold bones into adult shape
  3. c 1. Fracture tears and destroys blood vessels that carry nutrients to osteocytes
    2. Vascular damage initiates repair sequence
    3. Callus - specialized repair tissue that binds the broken ends of the fracture together
    4. Rapidly growing callus tissue effectively collars broken ends and stabilizes fracture so healing can proceed.
  4. d 1. Osteoblasts - not trapped by matrix (under endosteum or periosteum
    2. Osteocytes - trapped by matrix
    3. Osteoclasts - break down
    a. Multinucleated
    breaks down matrix thru lysosome (which breaks down enzymes)

    If you break bone you can rebuild matrix
  5. e 1. Cancellous (Spongy) Bone - inside bone
    2. Compact Bone - outside
    3. Long Bones - femur, tibia & humerous
    4. Short Bones - carpals, tarsals
    5. Flat Bones - skull, sternum
    6. Irregular Bones - pelvis

5 Multiple choice questions

  1. cartilage gets blood flow from surface.
    ossified the ends - so you can walk
    ossified at shaft & cartilage is in between.

    (see slide #16)
  2. specialized repair tissue that binds the broken ends of the fracture together.
  3. mainly blood vessels. connect central canals (ex. if one central canal gets clogged then get from here)
  4. curvature of the spine
  5. connective tissue
    1. Matrix dominates (calcium, calcium phosphate, sodium...)
    2. Inorganic salt - hydroxyapatite
    calcium phosphate (gives bones hardness)
    3. Organic matrix - protein fibers = gives you flexibility

    Note 1: need both organic and inorganic btw cells.
    Note 2: if calcium phosphate is the only thing in the bones then brittle bones and they shattered.
    Note 3: is only organic then osteoporosis

5 True/False questions

  1. central or Haversian canalblood vessels, lymphatic vessels

          

  2. endochondral ossification 1/21. Most bones develop this process
    2. Formation of primary ossification center and marrow cavity in shaft of model
    a. Bony collar developed by osteoblasts
    b. Chondrocytes swell and die
    c. Stem cells give rise to osteoblasts and clasts
    d. Bone laid down and marrow cavity created

    epiphysis - needs to be remodeled (reshaped)
    bone grows on the outside and then an inner layer disappears by osteoclasts. this is so the bones don't get too heavy

          

  3. calcitonin secretionhigh blood calcium levels results in stimulation of osteoblasts and inhibit osteoclasts

          

  4. peribone marrow

          

  5. Cancellous or spongy bone (3)1. Diaphysis - shaft
    2. Epiphysis - bulby ends, where muscles attach
    3. Epiphyseal plate or disk - cartilage, plate=still growing, line=stopped growing (white line)
    4. Medullary or marrow cavity - hollow, living bone has marrow
    5. Periosteum - around the bone
    6. Endosteum - lines the cavity, inside
    7. Articular cartilage - covers head & bottom

          

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