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29 Cards in this Set
- Front
- Back
In fibrous connective tissue we have _______ which consists of glucosamine and glucouronic acid.
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Hyaluronic Acid
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In cartilage we have ___________ which consists of galactosamine and glucouronic acid.
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Chondroitin
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T/F
Chondrocytes reside in lacunae |
True
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What type of growth does cartilage undergo?
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Interstitial Growth -expanding from the inside
Appositional growth - matrix deposited on surface |
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What do the outer cells of the mesenchyme differentiate into?
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Fibroblasts - make collagen
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What do the cells on the inner layer of mesenchyme differentiate into?
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Chondroblasts
(inner layer of mesenchyme called the perichondrium) |
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What type of growth do bones go under?
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Appositional Growth Only
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What type of collagen is found in cartilage?
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Type II
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What type of collagen is found in connective tissue and bone?
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Type I
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What are the clusters of related chondrocytes in their own little lacunae called?
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Cell Nests or Isogenous Cells
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What is found at the ends of bones?
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Articular Cartilage
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How is elastic cartilage different from hyaline cartilage?
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In addition to type II fibers there is also Elastic Fibers
(found in ear and tip of nose) BENDABILITY |
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How is fibrocartilage different from hyaline cartilage?
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Intermingles with connective tissue
(Joe's input - actually it is the only cartilage with both Type I & II collagen) |
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T/F
You retain the same bone throughout life. |
False
You don't have a single molecule of bone that you had 4 years ago |
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What are bones reservoirs for?
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Ca++
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What is the ratio of Inorganic to Organic composition of bone?
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2/3:1/3
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What is the organic component of bone?
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Mostly collagen to give flexibility
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What does the outermost layer of the periosteum do?
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Make Fibroblasts
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What does the innermost layer of the periosteum do?
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Makes cells that can differentiate into bone cells
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What is the layer lining the marrow cavity called?
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Endosteum
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What does the endosteum do?
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Makes new connective tissue cells and new bone cells
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What is one of the two spaces that bone formation occurs?
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Membranous environment
(& Cartilagenous environment) |
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When does and osteoblast become an osteocyte?
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Once the osteoblast walls itself off in the osteoid in a lacunae - it can no longer divide
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What are the microscopically long channels through which oxygen can diffuse through bone?
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canaliculi
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T/F
Osteoblasts are eosinophilic because they are making a large amount of protein to export |
False
That makes them basophilic |
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What is a multinucleated bone cell?
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Osteoclast
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What first produces acid that demineralizes bone then uses a lysozomal enzyme that breaks down collagen?
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Osteoclasts
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What is another name for haversion systems?
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Osteons
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What carries the nerves and blood vessels within bone?
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Haversion canals
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