Anatomy and Physiology Flashcards
1
Q
Sutural Bones
A
- Small, irregular bones
- Found between the flat bones of the skull
2
Q
Irregular Bones
A
-Have complex shapes
3
Q
Short bones
A
-Small and thick (ankle/wrist)
4
Q
Flat bones
A
-Thin with parallel surfaces
5
Q
Long Bones
A
-Long and thin
6
Q
Sesamoid bones
A
Small and flat
7
Q
Structure of long bone
A
Diaphysis, Epiphysis, Metaphysis
8
Q
Osteocytes
A
- maintain bone matrix
- Live in lacunae
- Do NOT divide
9
Q
Two major functions of osteocytes
A
- Maintain protein and mineral content of matrix
- Repair damaged bone
10
Q
Osteoblast
A
- Secrete matrix cpds.
- Osteoblasts surrounded by bone become osteocytes
11
Q
What is an osteoid
A
Matrix produced by osteoblasts, not yet calcified to form bone
12
Q
Osteoprogenitor Cells
A
- Divide and produce osteoblasts
- Fracture repair
13
Q
Osteoclasts
A
- Secrete acids and protein-digesting enzymes
- Dissolve bone matrix and release stored minerals
14
Q
What is homeostasis?
A
Bone building by osteoblasts and bone recycling by osteoclasts must balance
15
Q
What causes osteoblasts to build bone?
A
Weight-bearing excercise
