Anatomy Module 4 Tst

Define the following terms:

Osteoblast: cell that forms bone

Osteocyte: mature cell that is surrounded by bone matrix

Osteoclast: cell that contains multiple nuclei and breaks down bone

Hematoma: mass of blood that is confined to a certain space

Callus: mass of tissue that connects the ends of a broken bone

Anatomical Position: when someone stands with their feet forward, arms hanging down at sides, and their palms forward with their thumbs out

2. A bone is low on collagen. What will that do to the properties of the bone?

The bone will not be as flexible and will be very brittle

3. What kind of bone tissue contains trabeculae?

Cancellous

4. By means of what structure do osteocytes communicate with each other?

Interstitial lamellae

5. Name three reasons that bone must be continually remodelled.

Reshape bones

Increase/decrease bone size based on activity

Repair a broken bone

6. What kind of growth is available to a bone whose epiphyseal plate is ossified? You should use the proper term.

Bone remodelling

7. When a bone is being repaired, what holds the pieces of the bone together while the repairing occurs?

External Callus

8. A person’s body starts actively secreting PTH. What gland is working, and why is this happening?

Parathyroid gland, not enough calcium in the blood