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17 Cards in this Set

  • Front
  • Back
Growth in thickness or appositional growth
cells of the inner periosteum layer differentiate into osteoblast and deposit superficial layers of bone matrix, increasing bone in diameter
Bone Remodeling
continuous process that happens at same rate where osteoclast breaks old matrix and osteoblast produces new ones
Bone and calcium homeostasis
8.5 to 11 mg/dL is the normal blood level of Ca; found in bones, nerve function, muscle contraction, and blood clotting; negative feedback using PTH and calcitonin
PTH or parathyroid hormone
Produced by parathyroid gland when Ca blood level is below 8.5 mg/dL; activate osteoclast, stimulate Vit D, and suppress kidney
Produced by thyroid gland when Ca blood level is above 11 mg/dL; stimulates osteoblast and kidney activities
Fracture or broken bone classification
Transverse, Greenstick, Colles’, Comminuted, Pott’s, Compression
Transverse fracture
Straight horizontal break on the bone
Spiral fracture
“S” shape break on the long bone; happens when long bone is twisted
Greenstick fracture
“green stick” as in young tree branch; young children’s bone will not break totally and bend on one side
Colles' fracture
Break on the distal end of the radius resulting on broken wrist
Comminuted fracture
a break that result in many pieces
Pott’s fracture
Both bones (tibia and fibula) break resulting in an ankle fracture
Compression fracture
Happens when a bone is pushed against another bone such as the vertebrae after a vehicular accident
Inadequate ossification → thin and weak bones → osteoporosis; happens during low estrogen production of women age 45 and above; there is less osteoblast activity
Result after chronic osteopenia; ↓osteoblast activity + continous osteoclast activity = less bone mass or “porotic” bone
Vit D deficiency in young children lead to less Ca synthesized from the diet lead to soft bone then bowed leg
Vit D deficiency in adult; happens in countries that has less sunlight