Unit 3 Skeletal Sytem

Question 1

What are the parts of the skeletal system made up of?

Answer 1

Connective tissues that consist of living cells surrounded by an extracellular matrix.

Question 2

True or false - the extracellular matrix of all of the different types connective tissues of the skeletal system are made of the same type of fibers.

Answer 2

False
Different types of connective tissue are made up of different types of fibers.

Question 3

What are the two hallmarks of connective tissue?

Answer 3

1. Extracellular matrix
2. Variations in blood supply

Question 4

What are connective tissues made of?

Answer 4

1. Many different types of cells
2. Varying amounts of a nonliving substance found outside the cells

Question 5

Which connective tissues have a poor blood supply?

Answer 5

Tendons and ligaments

Question 6

Which connective tissue is avascular (has no blood supply).

Answer 6

Cartilage

Question 7

What causes tendons, ligaments and cartilage to heal slowly?

Answer 7

Poor blood supply

Question 8

What is bone tissue called?

Answer 8

Osseous tissue

Question 9

What are bone cells called?

Answer 9

Osteocytes

Question 10

What are the two basic components of the bone structure?

Answer 10

1. Osteocytes (bone cells) that sit in cavities called “pits” or lacunae
2. Matrix composed of calcium salts and a large number of collagen fibers surrounds the “pit”

Question 11

What gives bone its strength?

Answer 11

Calcium salts combined with a large number of collagen fibers

Question 12

True ar false - cartilage is less hard and more flexible than bone

Answer 12

True

Question 13

What are the cells that make up cartilage called?

Answer 13

Chondrocytes

Question 14

What are the three types of cartilage?

Answer 14

1. Hyaline cartilage
2. Fibrocartilage
3. Elastic cartilage

Question 15

What is two other names for dense connective tissue?

Answer 15

1. Dense regular tissue
2. Irregular fibrous tissue

Question 16

What are the components of dense connective tissue?

Answer 16

1. Collagen fibers (main matrix element)
2. Rows of fibroblasts between the collagen fibers

Question 17

Describe the characteristics of dense connective (irregular fibrous) tissue.

Answer 17

Strong ropelike structures that withstand tension in one direction

Question 18

Where is dense connective tissue found in the body?

Answer 18

In the dermis of the skin

Question 19

Describe loose connective tissue

Answer 19

Relatively softer with more cells and fewer fibers than other tissues (excluding blood)

Question 20

What are three types of loose connective tissue?

Answer 20

1. Areolar
2. Adipose
3. Reticular

Question 21

True of false - blood is considered a connective tissue

Answer 21

True

Question 22

What is the skeletal system?

Answer 22

The framework of the body

Question 23

What are the different components of the skeletal system?

Answer 23

1. Bones
2. Cartilage
3. Joints
4. Ligaments

Question 24

What two parts is the skeletal system divided into?

Answer 24

1. Axial skeleton
2. Appendicular skeleton

Question 25

What makes up the axial skeleton?

Answer 25

The bones that form the logitudinal axis of the body

Question 26

What makes up the appendicular skeleton?

Answer 26

The bones of the limbs and girdles that attached them to the axial skeleton

Question 27

What part of the skeletal system gives it flexibility and allows movement to,occur?

Answer 27

Joints