Bio 40a chapter 6

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Author:
nando54321
ID:
188840
Filename:
Bio 40a chapter 6
Updated:
2012-12-12 16:40:23
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bio 40a chapter
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Description:
Bone tissue
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  1. List and describe the six functions of bones
    • 1)¬†supports soft tissue and provides attachment for skeletal muscle
    • 2) Protects Organs
    • 3) Assist in movement
    • 4) Stores and releases minerals
    • 5) Contains red bone marrow-makes red blood cells
    • 6) Contains yellow marrow-stores triglycerides
  2. list and describe function of the four cells found in bone
    • 1) Osteogenic cells-unspecialized stem cells
    • 2) Osteoblasts-Bone building cells
    • 3) Osteocytes- maintain daily metabolism
    • 4) Osteoclasts-Carves out out bone
  3. Define Ossification
    Developmental process of bone formation
  4. What are the two methods/patterns of bone formation
    • 1) intramembranous ossification
    • 2) endochondral ossification
  5. Describe the intramembranous process
    • 1) development of the ossification center
    • 2) calcification
    • 3) foration of traberculae
    • 4) development of the periosteum
  6. What kind of bone go through intramembranous process?
    1) flat bones of skull and most facial bones
  7. Describe the endochondrial ossification process
    • 1) development of the cartilage model
    • 2) growth fo the cartilage model
    • 3) development of primary ossification center
    • 4) Development of medullary cavity
    • 5) Development of secondary ossification center
    • 6) Formation of artucular cartilage and the epiphyseal growth plate
  8. What types of bones go through endochondral process
    1) long bones, such as femur and tibia
  9. How do bones grow in lengh?
    1) bones grow in the epiphyseal plate by interstitial growth
  10. What is the epiphyseal plate?
    It's a layer of hyaline cartilage
  11. List, describe and give function of 4 zones in epiphyseal plate
    • 1) Resting cartilage-small scattered chondrocytes, they anchor epiphyseal plate
    • 2) Proliferating Cartilage, stack of coins, chondrocytes divide.
    • 3) Hypertrophic cartilage, large maturing chondrocytes
    • 4) Calcified cartilage, nearest to diaphysis, new bone matrix is produced.
  12. How do bones grow in thickness?
    By appistional growth
  13. Describe Appositional growth
    osteoblast deposit new bone on outer surface, then bone tissue is destroyed by osteoclast in endosteum
  14. Name the important hormones that regulate bone growth
    Insulinlike Growth Factors
  15. Describe the role of bone in calcium homeostasis
    muscles and cells depend on a stable level of calcium ions to function properly, bones can give or take calcium from blood stream.
  16. Which hormones regulate calcium homeostasis
    Parathyroid hormone

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