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19 Cards in this Set
- Front
- Back
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What are 3 things that compose the hyaline cartilage matrix?
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1. Collagen
2. Water 3. Chondroitin sulfate |
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How does condroitin sulfate differ from hyaluronic acid?
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It contains galactosamine instead of glucosamine.
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Caritlagenous cells differentiate from what?
What do they form? |
Mesenchyme.
Protochondral tissue. |
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Where do the chondrocytes reside?
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In Lacunae--Isogenous cells (cell nests)
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What is interstitial growth?
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Growth from the inside out. Enlargement of the internal mass of cartilage by mitotic divisions. We see it from the chondrocytes residing in lacunae.
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What are the 2 layers that mesenchymal cells differentiate into?
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1. Fibroblasts (outer layer)
2. Chondroblasts (inner layer) |
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What is appositional growth?
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Growth from outer periphery. Laying down new matrix on the outside.
Inner layers of perichondrium cells divide and differentiate into chondroblasts. |
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Cartilage matrix has what type of collagen?
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Type II
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Lacunae are filled with these...
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...Rough ER, Proteins and Fats (as they age).
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What are the 3 types of cartilage?
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1. Hyaline (most important)
2. Elastic (ears, nose, etc.) 3. Fibrocartilage (intervertebral discs, pubic symphysis; has some type I collagen intermixed) |
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Name 4 functions of bone as an organ.
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1. Support for body
2. Growth 3. Reservoir of calcium 4. Remodeling |
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Bone is basically a __________ meshwork involving embedded _________.
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collagen
minerals |
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What is the primary component of inorganic bone?
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Hydroxyapetite (2/3 of dry weight)
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What is the primary component of organic bone?
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Type I collagen (1/3 of dry weight)
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This is the name for bone's external lining.
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Periosteum
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This is the name for bone's internal lining.
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Endosteum
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What are the outer and inner layers of bone called?
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Outer --> Compact
Inner --> Cancellous or Spongy |
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Bone growth is...
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...appositional.
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Bone is taken away where?
Bone is added where? |
Taken away from the inside and added to the outside.
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