L12-2

Question 1

RE-SORP-TION is “”

Answer 1

the break down of bone

Question 2

describe bone modeling

• when does it occur most often
• key characteristic (two sentences)

Answer 2

during growth

osteoclasts break down bone in one area while the osteoblast builds bone in another area. In other words, osteoclasts and osteoblasts work independently of each other

Question 3

List three machines used to examine bone

Answer 3

1) DXA
2) pQCT
3) high resolution pQCT

Question 4

describe DXA

-problem with it

Answer 4

X ray machine that tells you how dense your bones are

X ray is 2-D so you don’t truly understand the structure of bone

Question 5

read: pQCT tells you about the bone cross sectional structure, which tells you about bone strength

Answer 5

-

Question 6

what do you mean by paradigm shift

Answer 6

move away from past

NOW is better

Question 7

look at pp

Answer 7

look

Question 8

describe bone remodeling

-two key characteristics that make it different from modeling

Answer 8

involves the coupled action of osteoclasts and osteoblasts

remodeling happens in everyone bc at least 5% of our bone is being remodeled at any time