Histology - Lecture 3

Question 1

Vitality of bone resides in its ability to continuously…

Answer 1

replace itself

Question 2

During skeletal growth, bone deposition … bone resorption

Answer 2

exceeds

Question 3

During adulthood, bone deposition and bone resorption are…

Answer 3

balanced

Question 4

In old age, bone resorption … bone deposition

Answer 4

exceeds (causing loss of skeletal mass)

Question 5

2 processes of bone repair

Answer 5

• stochastic process
• directed process

Question 6

Bone repair: stochastic vs directed process

Question 7

In the adult skeleton, the demand for osteoblasts is created by…
The demand for osteoclasts is governed by…

Question 8

In the diaphysis, woven bone is replaced by…

Question 9

*** woven bone - layer of osteoclasts on the surface, producing more and more woven bone (grows outwardly
Eventually condenses and gets replaced by…?

Question 10

Endostial area contains a layer of osteoclasts and always faces…

Answer 10

the bone marrow

Question 11

Osteoclasts tunnel into the woven bone in the direction of the ??? and hen turn by 90 degrees (in the same direction as the bone), forming the future Bowman’s canal??

Question 12

Osteoblasts at the surface of the tunnels formed by osteoclasts will divide and proliferate to produce multiple layer of lamellar bone, forming Haversian systems. The Haversian systems will replace the woven born by birth.

Question 13

As skeletal growth draws to a close, the periosteum adds … the outside in the form of concentric lamellae that encircle the entire bone

Answer 13

“sheets” of bone wrapping

Question 14

Why do we say the metaphysis and epiphysis is made of mixed spicules?

Answer 14

Woven/trabecular bone surrounded by ? thick bone

Question 15

The epiphyseal plate separates … (2)

Answer 15

epiphysis and metaphysis