5 Written questions
5 Matching questions
- structure of the osteon (3 & 5 components)
- endochondral ossification 2/2
- a no calcium. deterioration of vertebral support.
1. Bones lose mass and become increasingly brittle and subject to fractures
2. More prevalent in women - postmenopausal
3. Men develop later in life - senile
genetics, diet & exercise
- b bone tissue can repair itself due to blood supply
1. AKA Haversian systems
2. Permit delivery of nutrients and removal of waste products
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)
- c 1. Secondary ossification centers and marrow cavities form in ends of bone
2. Cartilage remains as articular cartilage and epiphyseal (growth) plates
a. Growth plates provide for increase in length of bone during childhood and adolescence
b. Disappear when growth stops
- d combined action of osteoblasts & osteoclasts to mold bones into adult shape
- e bone absorbing cell
breaks down the matrix
5 Multiple choice questions
- blood vessels, lymphatic vessels & nerves
- bone cell (mature bone cells)
- 1. during bone formation osteoblasts remove calcium from blood, lowering its circulating levels
2. when osteoclasts are active and breakdown of bone predominates, calcium is released into blood & circulating levels will increase.
- specialized repair tissue that binds the broken ends of the fracture together.
- like like little cracks, actually canals
5 True/False questions
spinal disorder (lordosis) → thoracic curve (hunchback)
Repair of fractures 1/2 → 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.
interstitial growth → growth in length
lamella → inside
sinus → specialized repair tissue that binds the broken ends of the fracture together.