Lec exam 2 Skeletal system

Question 1

What are the basic functions of the Skeletal system?

Answer 1

Support and protect
Movement
Hemopoiesis
Storage of mineral and energy reserve

Question 2

Hemopoiesis

Answer 2

• Process of blood cell production
• occurs in red bone marrow connective tissue
• Contains stem cells that form blood cells and platelets

Question 3

How does the skeletal system protect and support?

Answer 3

-framework for body and protects delicate tissues

Question 4

Bones

Answer 4

Primary organs of the system

form rigid framework for the body

Question 5

Types of bones

Answer 5

compact and spongy

Question 6

Compact bone

Answer 6

Also called dense or cortical bone

appears white smooth and solid

Question 7

What percentage of compact bone is bone mass?

Answer 7

80%

Question 8

Spongy bone

Answer 8

Cancellous or trabecular
located internal to compact bone
appears porous

Question 9

What percentage of spongy bone is the bone mass?

Answer 9

20%

Question 10

Difference between the trabecular bone and the compact bones matrix?

Answer 10

Compact- few open spaces

Trabecular- a lot of open spaces

Question 11

Advantages of the spongy bone

Answer 11

• lighter in weight than compact bone
• well adapted for distributing stress
• can be remodeled if the bones change

Question 12

Nutrient foramen

Answer 12

small opening or hole in the bone

artery entrance and vein exit

Question 13

Diaphysis

Answer 13

elongated, usually cylindrical shaft

provides for leverage and major weight support

Question 14

Medullary cavity

Answer 14

hollow, cylindrical space within the diaphysis
contains red bone marrow in children
contains yellow bone marrow in adults

Question 15

Epiphysis

Answer 15

knobby region at the end of long bone

Proximal/distal

Question 16

Metaphysis

Answer 16

region of mature bone between diaphysis and epiphysis