Quiz

The narrow passageways that contain cytoplasmic extensions of osteocytes are called

• lamellae

• lacunae

• canaliculi

• marrow cavities

Calcification refers to the

• formation of new bone tissue

• deposition of calcium salts within a tissue

• deposition of calcium salts within a bone

• repair of fractured bones

The following are major steps in the process of intramembranous ossifications

1. Clusters of osteoblasts form osteoid that becomes mineralized
2. Osteoblasts cluster together to form an ossification center
3. Small struts of bone called spicules radiate out from the ossification centers to join with neighboring spicules
4. Osteoblasts differentiate within a connective tissue at the site of arterioles

• 4, 1, 2, 3

• 2, 1, 3, 4

• 4, 2, 1, 3

• 1, 2, 3, 4

Endochondral ossification begins with the formation of

• a fibrous connective - tissue model

• a membranous model

• a calcified model

• a cartilage model

Parathyroid hormone functions in all of the following ways, except it

• stimulates osteoclast activity

• decreases the rate of calcium absorption

• decreases the rate of calcium excretion

• stimulates osteoblast activity

How would increasing the proportion of organic molecules to inorganic components in the bony matrix affect the physical characteristics of bone?

• The bones would be stronger

• The bones would be less flexible

• The bones would be more flexible

• The bones would be more brittle

The trabeculae of spongy bone

• are organized parallel to the long axis of the bone

• are organized along stress lines

• are composed mostly of cartilage

• will collapse under stress

A immovable joint is a(n)

• synarthrosis

• diarthrosis

• amphiarthrosis

• syndesmosis

A slightly moveable join is a(n)

• synarthrosis

• diarthrosis

• amphiarthrosis

• gomphosis

Dense connective tissue is to a suture as a periodontal ligament is to a(n)

• amphiarthrosis

• syndesmosis

• synostosis

• gomphosis