Chap 5: Bone (exam 2) Flashcards
Bone is another type of specialized ct which is what compared to cartilage?
harder and less flexible
what are the four main functions of bone?
structural support, serves as levers for muscles/locomotion, protect organs and house bone marrow, metabolic reserve for minerals
What are the two types of matrix found in Bone?
inorganic matrix and organic matrix
the inorganic matrix is made up of what?
hydroxyapatite crystals, calcium phosphate and other minerals
about 65% of the bones dry weight comes from what matrix?
inorganic matrix
The organic matrix is made up of what?
collagen (I primarily), GAG’s, glycoproteins,
80-90% of the organic matrix is made up of what?
collagen
In the organic matrix collagen is highly what?
organized
What are the two types of GAG’s in the organic matrix
Sulfated and unsulfated GAGs
The unsulfated gag are what?
HA
the sulfated GAG’s are what?
Chondroitin and keratin sulfates
The glycoproteins in the organic matrix are proteins that bind what to what?
minerals to collagen
and matrix components to cells
Glycoproteins are also known as what?
binding proteins
the binding proteins will enhance what?
the mineral deposition in an orderly fashion during the ossification process
There is a lower % of minerals leading to more flexibility on bone in adults or children?
children
