Structure & Bone Function
Calcium phosphate accounts for how much of the bone’s weight?
2/3 of total weight
In intramembranous ossification, what tissue does bone replace?
Mesenchymal tissue
The inadequate ossification that occurs with aging is called
Osteopenia
How many bones do adults have?
206
Basic functional unit of mature compact bone
Osteon
In endochondral ossification, what tissue does bone replace?
Hyaline cartilage
How long do osteoblasts and osteoclasts remain active?
Throughout life
A small rough projection of a bone is called a
Tuberosity
What are the four cell types found in bone?
Osteoblasts, osteocytes, osteoprogenitor cells, and osteoclasts
Which type(s) of bone are produced by intramembranous ossification?
Flat bones
Which type of individual will have more prominent bone markings, a bodybuilder or a couch potato?
Bodybuilder
The sternum if an example of what time of bone structure
Function of osteoblasts
Production of new bone (osteogenesis)
Four sets of blood vessels that supply bone with blood and nutrients?
Nutrient arteries/veins, metaphyseal vessels, epiphyseal vessels, & periosteal vessel
Why would a poor diet hinder the repair of a bone fracture?
Not enough minerals (calcium and phosphate) to produce new matrix
Which bone shape contains air pockets?
Pneumatized bones
Which of the bone cells is the only one that can divide?
Osteoprogenitor cells
Process by which the diameter of developing bone enlarges is
Appositional growth at the outer surface
When a bone is stressed, its crystals generate a minute electrical field, what do these electric fields promote?
Bone growth, osteoblasts are attracted and they produce bone
Only type of bone that the periosteum doesn’t surround
Sesamoid bones