Quiz 1 Flashcards
What is the function of each type of bone cell?
osteoblast – form bone
osteocyte – maintain or nurture bone
osteoclast – remodel bone
What are the FOUR basic tissues of the human body?
- epithelial
- muscle
- neural
- connective
What is the primary constituent of the GROUND substance?
glycosaminoglycans
What is the principal type of protein fiber in bone?
collagen type 1
What is the most frequently described deposit in bone?
hydroxaypatite
What is Wolfe’s Law as it pertains to bone?
living tissue will respond to stressors; bone is formed or absorbed in response to stress.
What are the THREE responses of bone that allow it to be described as “living”?
it has the ability to age, heal, and remodel under stressors.
What is bone the embryological derivative of?
mesenchyme or cartilage
What is the name given to the pattern ossification in mesenchyme?
intramembranous ossification
What is the timing for appearance of intramembranous ossification?
second to third month in utero
What is the timing for the appearance of ossification in cartilage and what is the name given to it?
second to fifth month in utero and endochondral ossification
What part of the skull is derived from endochondral ossification?
chondrocranium
Which bone of the appendicular skeleton is formed by both endochondral and intramembranous ossification?
the clavicle
What are the primary source of variation observed in bone?
sexual dimorphism (gender variation) ontogenetic variation (growth or age variation) geographic or population based variation (ethnic variation) Idiosyncratic variation (individual variation)
What are the six more commonly used classifications of normal bone?
long bone, short bone, flat bone, irregular bone, paranasal sinus or pneumatic bone and sesamoid bones