Ch. 7 part 3 anatomy

Question 1

Osteoid produced by osteoblasts contain what?

Answer 1

Collagen protein (carbon) - Organic

Question 2

Organic components functions

Answer 2

Tension strength and bone flexibility

Question 3

Inorganic components contain what?

Answer 3

Salt crystals, calcium phosphate

Question 4

When calcium phosphate and calcium hydroxide interact forming what?

Answer 4

Crystals, hydroxyapatite

Question 5

What happens when crystals surround around collagen fiber?

Answer 5

It hardens matrix and account for rigidity of bones

Question 6

Bone formation begins with what?

Answer 6

Secretion of osteoid

Question 7

What is required for bone formation?

Answer 7

Vitamin D, Vitamin C, Calcium and phosphate for calcification

Question 8

What is Vitamin D function?

Answer 8

Enhances calcium absorption from GI tract

Question 9

What is Vitamin C function?

Answer 9

Making proteins that are flexible for the bone

Question 10

In bone resorption osteoclast breakdown what?

Answer 10

Lots of lysosomes

Question 11

What is released from lysosomes within osteoclasts?

Answer 11

Proteolytic enzymes

Question 12

When does bone resorption occur?

Answer 12

When bone calcium levels are low

Question 13

What are osteons?

Answer 13

Basic functional and structural unit of mature compact bone

Question 14

Function of collagen fiber

Answer 14

Give bone strength and resilience

Question 15

What is trabeculae function in spongy bone?

Answer 15

Resistance to stresses

Question 16

Function of central canal

Answer 16

Osteon component Parallel; Blood vessels and nerves extend through channel

Question 17

Function of canaliculi

Answer 17

Allows exchange of nutrients and waste between blood vessels and osteocytes

Question 18

What are lacunae?

Answer 18

Occupy small spaces

Question 19

What are concentric lamellae?

Answer 19

Osteon component, Rings of bone CT, surround central canal, and collagen fibers