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23 Cards in this Set

  • Front
  • Back
growth in length is called
interstitial
growth in width is called
appositional
bones made intramembraneously
skull and parts of the mandible and fully grown by about the age of two
which of the primary germ layers do bones come from
mesoderm
the membrane covering the cartilage model of bone is called
perichondrium
the artery that takes blood supply into the cartilage model of bone after the chondrocyte cells hypertrophy, explode, and alter the pH
nutrient artery
membrane that surrounds bone
periosteum
membrane that surrounds cartilage
perichondrium
two events that take place to initiate calcification or laying down of bone over the cartilage model
chondrocyte cells hypertrophy which alter the pH and the nutrient artery punctures it
growth plate is officially known as
epiphyseal plate
4 zones of the epiphyseal plate
zone of resting cartilage
zone of proliferating cartilage
zone of hypertrophy
zone of calcification
where do chondrocyte cells anchor the epiphyseal plate to the epiphysis
zone of resting cartilage
only cell where cell division occurs
zone of proliferating cartilage
what occurs when the epiphyseal plate closes to soon
achondroplastic dwarfism
what hormone lowers blood calcium levels
calcitonin
what does calcitonin do
inhibits osteoclasts stimulates osteoblasts to build bone in an effort to lower blood calcium levels
what hormone increases blood calcium levels
parathyroid
what does parathyroid do
inhibits osteoblasts ans stimulates osteoclasts in an effort to raise blood calcium levels
what is the most mature form of vitamin D
calcitrol
basophils
produce histamine and create an inflammatory response
neutrophils
are phagocytic and eat stuff up and die
macrophages
phagocytic and the fibroblast cells follow them
describe the vitamin D pathway
starts in the skin
activated by UV rays
parathyroid hormone does it thing in teh kidneys
the final form of calcium is calcitrol