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5 Written Questions

5 Matching Questions

  1. deep layer (periosteal membrane)
  2. canaliculi
  3. fact: periosteum is richly supplied with nerves and blood vessels
  4. rickets
  5. resting (quiescent) zone
  1. a why broken bones are painful and bleed profusely
  2. b cartilage cells nearest the epiphysis are relatively small and inactive
  3. c "spider legs"
    - thin tubes
    - osteocytes (mature bone cells), their bodies occupy small cavities in the solid matrix called lacunae
    "little canals" run through the matrix, connecting neighboring lacunae to one another and to the nearest capillaries, such as those in the central canals
    - within the canaliculi, the extensions of neighboring osteocytes touch each other and form gap junctions
  4. d like osteomalacia for kids
    - more severe than osteomalacia
    - caused by inadequate amounts of vitamin D or calcium phosphate in the diet
    - cured by drinking vitamin D-fortified milk and exposing the skin to sunlight
  5. e osteogenic, containing bone-depositing cells (osteoblasts) and bone-destroying cells (osteoclasts)
    - indistinguishable from the fibroblasts within this layer

5 Multiple Choice Questions

  1. similar to hyaline cartilage; matrix contains many elastic fibers along with the delicate collagen fibrils; more elastic than hyaline cartilage & better able to tolerate repeated bending; epiglottis and outer ear
  2. (blank)
  3. thin, flattened, and usually somewhat curved
    - most cranial bones of the skull, ribs, sternum, scapula
  4. applies to a number of disorders in adults in which the bones are inadequately mineralized
    - even though osteoid matrix is produced, calcification does not occur, and the bones soften and weaken
    - main symptom: pain when weight is put on the affected bone
    - caused by inadequate amounts of vitamin D or calcium phosphate in the diet
    - cured by drinking vitamin D-fortified milk and exposing the skin to sunlight
  5. superficial layer of dense irregular tissue--resists tension placed on a bone during bending
    - deep layer that abuts the compact bone

5 True/False Questions

  1. Perforating canals (Volkmann's canals)lie at right angles to the central canals and connect the blood and nerve supply of the periosteum to that of the central canals and the marrow cavity

          

  2. appositional growth (cartilage)"growth from outside"
    chondroblasts in the surrounding perichondrium produce the new cartilage tissue by actively secreting matrix

          

  3. functions of bonelonger than they are wide
    - has a shaft and two distinct ends

          

  4. membrane bonesroughly cube-shaped
    - occur in the wrist and ankle

          

  5. osteogenesis, before week 8skeleton of the human embryo consists only of hyaline cartilage and some membranes of mesenchyme, an embryonic connective tissue
    - bone tissue first appears in week 8 and eventually replaces most cartilage and mesenchymal membranes in the skeleton

          

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