Bone Tissue lecture 2

Question 1

For women, the drop in estrogen as part of aging has what effect on bone tissue?
Demineralization
A decreased number of osteoblasts
A decrease in protein synthesis
A decreased number of osteoprogenitor cells A decreased number of osteoclasts

Answer 1

Demineralization

Question 2

Which of the following is not a function of the skeleton?
Storage of calcium and phosphate ions Storage of red blood cells
Protecting the spinal cord
Protecting the brain
Providing leverage for muscles

Answer 2

Storage of red blood cells

Question 3

How would increasing the amount of osteoid in the bony matrix affect the physical characteristics of bone?
The bones would be stronger
The bones would be larger
The bone would be less flexible
The bones would be less compressible 
The bones would be more brittle

Answer 3

The bones would be stronger

Question 4

Which of the following are characteristics of the inorganic extracellular matrix.
Contains hydroxyapatite
Provides flexibility
Lots of collagen fibers 
Contains calcium carbonate 
Provides hardness
Includes glycoproteins

Answer 4

Contains hydroxyapatite
Contains calcium carbonate
Provides hardness

Question 5

If the __________ component of bone is not in adequate amounts, the flexibility and strength of bone will be compromised.

Answer 5

collagen

Question 6

The marrow cavity of the long bones are lined with

Answer 6

endosteum.

Question 7

Cells depositing bone matrix are

Answer 7

osteoblasts.

Question 8

Stem cells

Differentiate into osteoblasts

Answer 8

Osteogenic cells

Question 9

Bone building cells

Increased activity results in increased bone density

Answer 9

Osteoblasts

Question 10

Massive, multinucleated cells

Osteolysis

Answer 10

Osteoclasts

Question 11

Bone cells encased in matrix

Trapped in lacuane

Answer 11

Osteocytes

Question 12

Osteogenic cells are bone stem cells that differentiate into osteoblasts and osteoclasts
True
False

Answer 12

False

Question 13

Osteons in what type of bone tissue?

Answer 13

Compact bone

Question 14

Cortical bone is what type of bone tissue?

Answer 14

Compact bone

Question 15

what type of bone tissue is Found in the diaphysis of long bones?

Answer 15

Compact bone

Question 16

Central canals are found in what type of bone tissue?

Answer 16

Compact bone

Question 17

what type of bone tissue is Found in the superficial regions of all bones?

Answer 17

Compact bone

Question 18

Trabeculae is found in what type of bone tissue?

Answer 18

Spongy bone

Question 19

Diploe is found in what type of bone tissue?

Answer 19

Spongy bone

Question 20

what type of bone tissue is Found in the epiphyses of long bones?

Answer 20

Spongy bone

Question 21

Growth in length of an immature long bone occurs at the

Answer 21

epiphyseal plate.

Question 22

Intramembranous ossification produces the

Answer 22

flat bones of the skull.

Question 23

Which of the following structures or bones are associated with endochondral ossification?
Diaphysis 
Epiphyseal plates
Primary and secondary marrow cavities Diploe
Bony collar
Femur
Parietal bones of the skull 
Hyaline cartilage

Answer 23

Diaphysis 
Epiphyseal plates
Primary and secondary marrow cavities 
Bony collar
Femur
Hyaline cartilage

Question 24

In the epiphyseal plate, chondrocytes swell and die in which layer?

Answer 24

Zone of hypertrophy

Question 25

Patches of fibrocartilage formed in the healing of a fracture are called __________, whereas the bony collar formed around the fracture is called __________.

Answer 25

soft callus; hard callus

Question 26

In adults, red bone marrow can be found in the
diaphysis.
medullary cavity of long bones. 
head of the femur.
compact bone.

Answer 26

head of the femur.

Question 27

The gradual loss of bone matrix in elderly patients is

Answer 27

osteoporosis.

Question 28

The bone disease that involves excessive proliferation of osteoclasts; leading to rapid, disorderly bone bone remodeling and weak, deformed bones.

Answer 28

Paget’s disease

Question 29

Which of the following is not a function of parathyroid hormone (PTH)?
Lowers blood calcium
Inhibits osteoblast activity
Stimulates osteoclast activity
Promotes calcium reabsorption by the kidneys

Answer 29

Lowers blood calcium

Question 30

Bone protrudes through the skin in a fracture called

Answer 30

open.

Question 31

A break in a bone that is already weakened by some other disease is called a(n) __________ fracture.

Answer 31

pathological

Question 32

A fracture where the broken ends of the bones are fragmented is called a _______ fracture.

Answer 32

comminuted

Question 33

If a thyroid tumor secreted an excessive amount of calcitonin, we would expect

a rise in blood calcium concentrations.
an elevated level of osteoclast activity.
brittle bones.
an elevated level of osteoblast activity.
a reduced rate of endochondral ossification

Answer 33

an elevated level of osteoblast activity.