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5 Written questions

5 Matching questions

  1. sinus
  2. Functions of bone (5)
  3. structure of the osteon (3 & 5 components)
  4. peri
  5. bone tissue
  1. a 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
  2. b air pocket in the bone
  3. c to make RBCs
    1. Support (ex. to stand up)
    2. Protection (ex. cover vital organs)
    3. Movement - muscles covers - movement
    4. Mineral storage - calcium, 98% of calcium is stored in bone. (too much calc. in blood, then store in bones - like a bank, can add to bank until 30-35)
    5. Hematopoiesis (blood formation) - formation of blood cells, RBC, WBC, Platelets

    can't live w/o calc.
  4. d bone tissue can repair itself due to blood supply

    1. AKA Haversian systems
    2. Permit delivery of nutrients and removal of waste products
    3. Components
    a. Lamella - layers, rings, aka matrix
    b. Lacunae - dimples (osteon sits in lacunae)
    c. Canaliculi - like like little cracks, actually canals
    d. Central or Haversian canal - blood vessels, lymphatic vessels
    e. Volkmann's or Perforating canals - mainly blood vessels. connects central canals (ex. if one central canal gets clogged then get from here)
  5. e around

5 Multiple choice questions

  1. bone absorbing cell

    breaks down the matrix
  2. inside
  3. 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
  4. bone cell (mature bone cells)

    Maintains matrix
  5. growth in diameter

5 True/False questions

  1. parts of long bone (7)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

          

  2. endochondral ossification 2/21. 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. central canals containblood vessels, lymphatic vessels & nerves

          

  4. Development of bone (3)1. Osteogenesis
    2. Intramembranous ossification - replaces membrane
    a. Occurs within a connective tissue membrane
    b. Apposition growth
    i. Adds bone tissue to outer surface (inside to outside) "suture" is where the bones grew together w/bone cells.
    3. Endochondral ossification - replace cartilage
    a. Occurs within a cartilage model
    b. Bone is deposited by osteoblasts
    c. Appositional and Interstitial growth
    i. Increases in diameter and length

          

  5. lamellalayers, rings, aka matrix