Test 3 Lecture

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Lachayn3
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240323
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Test 3 Lecture
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2013-10-13 11:33:25
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Test 3 Lecture
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  1. Bone is dynamic tissue that is always:
    That is always remodeling
  2. What are the skeletal system major tissues
    Bone and cartilage
  3. Perichondrium
    • connective tissue layer surrounding each piece of cartilage
    • Responsible for the growth and repair of cartilage
  4. What are the Functions of bone?
    • Support
    • Protection
    • Mineral storage
    • Site of blood cell formation
    • Fat storage
  5. Mineral storage in the bone is mainly what?
    Calcium and phosphorus
  6. Formation of blood cells is also known as
    Hemopoiesis
  7. What are the types of bone in the human body?
    Long bones and Flat bone
  8. Long bones
    • Have bulbous ends (epiphysis)
    • Have narrow cylinder shaft (diaphysis)

    (Ex humerus, radius, femur, and tibia)
  9. Flat bones
    • Irregularly shaped
    • often flat but do not have to be

    (Ex skull bones, scapula, ribs, and tarsals)
  10. Epipysis
    • Long bone ends
    • Red bone (Hemopoeisis)
    • Spongy bone (Trabeculae)
    • Epipyseal plate
    • *Growth plate
    • *Hyaline cartilage
    • Articular surface
  11. Diapysis
    • Compact bone (Osteon)
    • Shaft
    • Yellow bone marrow
    • Storage place for fat
  12. Spongy bone
    • forms tarbeculae
    • found inside most flat bones and the ENDS OF LONG BONES
  13. Compact bone
    • forms Haversian systems
    • What the shaft of long bones are made out of
  14. Osteogenic cells
    Osteoprogenitor
    bone stem cells that transform into osteoblast found in embryo and periosteum
  15. Endosteum
    • Connective tissue layer on the inner surface of bone
    • source of cell for new growth and repair
  16. Periosteum
    CT covering of bone
  17. Articular surface
    is covered with hyaline cartilage
  18. Osteoblast
    bone forming cells
  19. Osteocytes
    bone maintaining cells
  20. Osteoclast
    bone resorption cells
  21. Hydroxyapatite crystals
    are the most abundant mineral salts
  22. What are the two types of bone formation
    • Intramembranous
    • Endochondral
  23. Intramembranous
    • Osteoprogenitor cells in embryonic connective tissue transform into osteoblast and begin forming bone
    • Most flat bones are develop by intramembranous bone formation.
  24. Endochonral ossification
    A model of the bone that is 1st formed from hyaline cartilage then replaced by bone
  25. The epiphyseal plate
    • Growth plate
    • made for hyaline cartilage
    • where longitudinal growth occures
    • replaced by bone at skeletal maturity
  26. Role of bone in calcium homeostasis
    • If blood calcium decreases
    • Then Parathyroid hormone increases
    • Result blood calcium increases

    • If blood calcium increases
    • then calcitonin increases
    • result blood calcium decreases
  27. Parathyroid Hormone
    • Increases activity of osteoclast
    • increases absorption of calcium from intestines
    • Increases retention of calcium in kidneys
  28. Calcitonin
    • Decreases osteoclast
    • Increases activity of osteoblast
    • Decreases absorption of calcium
    • Increases excretion of calcium from kidney
  29. The best way to deal with loss of bone mass is to:
    Remain as active as possible
  30. What are the spine abnormal curvature
    • Thoracic spines
    • *Scoliosis
    • *Kyphosis
    • Lumbar spine
    • *Lordosis
  31. What are the steps that happen after a break
    • Hematomia
    • Callus formation
    • Osteoblast
    • Remodeling

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