Lesson 8

Question 1

What type of connective tissue is found mainly in developing embryos and disappears as differentiation occurs?

Answer 1

Mesenchymal connective tissue

Question 2

What is the shape of mesenchymal cells?

Answer 2

Stellate (with cytoplasmic processes) or fusiform.

Question 3

Does the matrix of mesenchymal connective tissue have many connective tissue fibers?

Answer 3

No, it has very few connective tissue fibers.

Question 4

Where is mucoid connective tissue found?

Answer 4

1. Wharton’s jelly in the umbilical cord,
2. combs and wattles of gallinaceous birds,
3. and the core of the papilla of the reticulum and omasum.

Question 5

What types of cells compose mucoid connective tissue?

Answer 5

Fibroblasts and a few mesenchymal cells.

Question 6

What does the matrix of mucoid connective tissue contain?

Answer 6

Mucin and delicate collagenous fibers.

Question 7

What is another name for areolar connective tissue?

Answer 7

Loose ordinary connective tissue.

Question 8

Which cells are absent in areolar connective tissue?

Answer 8

Reticular cells

Question 9

What types of fibers are present in the matrix of areolar connective tissue?

Answer 9

Collagenous, reticular, and elastic fibers.

Question 10

What is a notable feature of areolar connective tissue?

Answer 10

The presence of defensive cells such as lymphocytes, plasma cells, and macrophages.

Question 11

Where is areolar connective tissue found?

Answer 11

a. Subepithelial connective tissue.
b. Mesenteries.
c. Between muscles and nerves & around blood vessels.
d. Between layers of smooth musculature in hollow organs.

Question 12

What are the two main types of dense connective tissue?

Answer 12

1. Irregular Dense White Fibrous Connective Tissue (DWFCT)
2. Regular Dense Connective Tissue

Question 13

What type of fibers are found in DWFCT?

Irregular Dense White Fibrous Connective Tissue (DWFCT)

Answer 13

Collagenous fibers with some reticular and elastic fibers.

Question 14

How does DWFCT differ from loose connective tissue in morphology?

Answer 14

It has fewer cells and more fibers than loose connective tissue.

Question 15

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Where is DWFCT found?

Irregular Dense White Fibrous Connective Tissue (DWFCT)

Answer 15

a. Subepidermal connective tissue.
b. Capsules of organs (e.g., lung, liver, kidney).
c. Aponeuroses and muscle fasciae.
d. Joint capsules.
e. Pericardium.

Question 16

What type of connective tissue has very few cells, mostly fibrocytes, and collagenous fibers in an orderly parallel orientation?

Answer 16

Collagenous connective tissue.

Question 17

How do fibrocytes and fibers appear in collagenous connective tissue?

Answer 17

They appear wavy.

Question 18

What color does collagen stain with H & E?

(Regular Dense Connective Tissue)
Collagenous Connective Tissue

Answer 18

Light pink.

Question 19

Where is collagenous connective tissue found?

Answer 19

In tendons and ligaments.

Question 20

What type of connective tissue has a predominance of elastic fibers in a parallel and branched array?

Answer 20

Elastic connective tissue.

Question 21

What cell type is predominant in elastic connective tissue?

Answer 21

Fibroblasts.

Question 22

Where is elastic connective tissue found?

Answer 22

a. Nuchal ligament.
b. Mural elements of arteries.
c. Elastic fasciae of abdominal musculature of herbivores.

Question 23

What organs or tissues are associated with reticular connective tissue?

Answer 23

1. Fibrous stroma of lymphatic and hemopoietic organs (spleen, bone marrow, lymph nodes).
2. Architectural framework of some organs/tissues (liver, adipose tissue, smooth muscle, islets of Langerhans).

Question 24

What type of connective tissue contains pigment-containing cells?

Answer 24

Pigmented connective tissue.

Question 24

What type of connective tissue consists of a fine reticulum of fibers (type III collagen) and cells?

Answer 24

Reticular connective tissue

Question 25

What is a **specialized variant of loose or areolar connective tissue** composed of fat cells or adipocytes?

Answer 25

Adipose tissue

Question 25

Where is pigmented connective tissue found?

Answer 25

In the **iris** and **choroid of the eye** and in connective **tissue associated with pigmented skin.**

Question 25

What is the appearance of fat cells in **white adipose tissue**?

Answer 25

Signet-ring appearance, with a single large fat droplet and a thin margin of cytoplasm.

Question 25

What are the two types of adipose tissue?

Answer 25

**White adipose tissue** (white fat, unilocular fat, ordinary adipose tissue) and **brown adipose tissue** (multilocular adipose tissue).

Question 26

What are the functions of fat cells and white adipose tissue?

Answer 26

Storage of fuel (fat) for the body. Insulating material. Fills crevices and cushions body parts.

Question 27

What characterizes the fat cells in brown adipose tissue?

Answer 27

They are multilocular, with numerous small fat droplets within the cytoplasm and a round nucleus.

Question 28

What gives brown adipose tissue its brown color?

Answer 28

Numerous mitochondria.

Question 29

Where is brown adipose tissue found?

Answer 29

1. Axilla. 1. Interscapular region. 1. Mediastinum. 1. Mesenteries. 1. Perirenal area of rodents, hibernating animals, and domestic animals.

Question 30

What is the function of brown adipose tissue?

Answer 30

To heat blood passing through and **maintain body temperature during hibernation.**

Question 31

What process brings about the regeneration and repair of connective and adipose tissue?

Answer 31

Mitosis of fibroblasts and mesenchymal cells.

Question 32

How does fibrous connective tissue repair other damaged tissues?

Answer 32

By scar formation or fibrosis.

Question 33

What is a potential drawback of fibrous connective tissue repair?

Answer 33

It may reduce or obliterate the normal function of the repaired tissue.