Exam 2 Flashcards
(35 cards)
Synarthrosis
Does not allow any movement between articulating bones
Amphiarthrosis
Allows small amount of movement between bones
Diarthrosis
Freely moveable through articulating bones
If inorganic matrix is destroyed, bone will become
Flexible & unable to resist compression
The function of yellow bone marrow is
Triglyceride storage
Osteon
Structural units of mature, compact bone
Primary ossification centers develop
In diaphysis
Ossification
Bone formation
Infants bone marrow is
Mostly red bone marrow
What allows oxygen, nutrients, & small substances to and from osteocytes trapped within lacunae
Caniculi
Endochondrial Ossification steps
- Perichondrium is invaded by blood vessels
- Osteoblasts build bone collar on external surface of bone
- Chondrocytes die
- In primary ossification center, osteoblasts replace calcified cartilage with early spongy bone
Bone is an important storage reservoir for
Calcium, phosphate, & lipids
Osteoblast
Bone decomposition
Bones perform
Fat storage, blood cell formation, & protection
What is not formed by the intramembranous ossification
Femur
Osteoclasts secrete matrix to produce
New bone tissue
Hydroxyapatite is NOT ASSOCIATED with
Organic matrix
What is the innermost surface lining of bones
Endosteum
Intramembranous ossification
Osteoblasts develop in primary ossification center
Osteoblasts lay down trabeculae of early spongy bone
Osteoblasts lay down early compact bone
Bone remodeling does not only occur
On the surface
PTH increases the activity of
Osteoclasts
When blood calcium levels rise above normal
Osteoclast is inhibited by calcitonin
Calcitonin is opposite of
PTH
Bone thickness growth is
Appositional growth
