CONNECTIVE TISSUE

Question 1

A. Identify the cell
B. Identify the fiber

Answer 1

A. Reticular cell
B. Reticular fiber

Question 2

A. Reticular fibers (colagen type-III fibrils) are synthesized by ?
B. What is the physiological function of reticular fibers in the lymph node?

Answer 2

A. Reticular cells
B. to form a meshwork in lymphatic tissues. Creates a sponge like structure within which cells and fluids are freely mobile

Question 3

A. Tan to reddish brown color is due to: ?
B. list one function of brown adipose tissue

Answer 3

A. mitochondria and extensive vascularity
B. Heat generation in newborn animals

Question 4

A. Identify the cell
B. Identify the cell

Answer 4

A. fibroblast
B. fibrocyte

Question 5

A. Identify the cell
B. List one functuon associated with this cell

Answer 5

A. White adipose (fat) cell
B. Stores fat for energy

Question 6

A. In mature tendons and ligaments, what type of cells are you more likely to see?
B. List one function associated with the cell

Answer 6

A. fibrocyte
B. Important for maintainng CT matrix

Question 7

A. Identify the cell
B. Identify the cell

Answer 7

A. Fibrocyte
B. Fibroblast

Question 8

A. Identify the fibers
B. What type of CT is shown here?

Answer 8

A. Collagen Type-I fiber
B. Dense irregular CT

Question 9

A. Identify the CT
B. Identify the structure

Answer 9

A. Dense irregular CT
B. Apocrine sweat gland

Question 10

A. Name one cell that synthesizes CT matrix
B. What is the significance of GAG or proteoglycans?

Answer 10

A. Fibroblast or Fibrocyte
B. GAGs are highly negatively charged which attracts and binds to a large amount of H20 molecules to permit rapid diffusion of nutrients through the matrix

Question 11

A. Identify the cell
B. List 3 identification features of this cell

Answer 11

A. Plasma cell
B. eccentric nucleus, negative Golgi image, basophilic cytoplasm

Question 12

A. list 2 chemical substances present in the mast cell granule
B. List a function for each of those chemical substances

Answer 12

A. Heparin and Histamine
B. Heparin: an anti-coagulent. Histamine: a vasodilator

Question 13

Two cells shown below are cut in cross-section. Based on the staining property of the nucleus, identify two CT cells.

Answer 13

A. Fibrocyte
B. Fibroblast

Question 14

What are some major functions of CT?

Answer 14

1. Provides a matrix that supports body components
2. Provides a medium thru which metabolites are exchanged
3. Storage of energy (fat tissue)
4. Defense/protection (immune cells)
5. Repair after injury

Question 15

What is the role of a fibroblast?

Answer 15

to produce extracellular matrix (ECM) of the CT

Question 16

What color does a fibroblast nucleus stain? Why?

Answer 16

Lightly basophilic. The nucleus is euchromatic.

Question 17

What color does a fibrocyte nucleus stain? Why?

Answer 17

dark blue (strongly basophilic). The nucleus is heterochromatic

Question 18

Macrophage major functions are ?

Answer 18

to phagocytize foreign and dead cells
to secrete substances that participate in defense and repair mechanisms

Question 19

Identify the cell

Answer 19

Macrophage

Question 20

Major identificators of a plasma cell?

Answer 20

1. Nucleus is round or oval and pushed to the side
2. Cytoplasm is basophilic with a pale staining area adjacent to it (the Negative Golgi Image)

Question 21

Major function of a plasma cell?

Answer 21

To synthesize antibodies

Question 22

What are the two main components of the ECM?

Answer 22

Protein fibers and proteoglycans

Question 23

What are the 3 types of protein fibers found in the ECM?

Answer 23

1. Collagen fibers
2. Retiular fibers
3. Elastic fibers

Question 24

What is the most abundant protein in the animal body?

Answer 24

collagen type-I

Question 25

Which cells produce collagen type-I?

Answer 25

Mainly fibroblasts
sometimes fibrocytes

Question 26

Collagen type-I forms ?? bundles when compared to other types of collagen

Answer 26

thick bundles

Question 27

Reticular fibers are made of collagen type-??

Answer 27

collagen type-III

Question 28

Where do you find reticular fibers?

Answer 28

they form meshwork in blood-forming organs

Question 29

Where do you find elastic fibers?

Answer 29

present in organs that require elasticty in addition to tensile strength

Question 30

What is the most abundant form of CT?

Answer 30

Loose CT

Question 31

Loose CT has a high ratio of ?:?

Answer 31

cells:collagen fibers

Question 32

Is loost CT more or less restistant to stress compared to dense CT?

Answer 32

less resistant to stress

Question 33

Dense CT has a high ratio of ?:?

Answer 33

collagen fibers (type I):cells

Question 34

Where do you find dense CT?

Answer 34

dermis, tendons, ligaments

Question 35

What type of CT?

Answer 35

Dense Regular CT

Question 36

Why is the irregular arrangement of dense irregular CT important?

Answer 36

It provides resistance to stress from all directions

Question 37

Why is the regular organization of collagen type-1 of regular dense CT important?

Answer 37

tendons are able to transmit a great amount of forces in a linear manner

Question 38

A. Identify the tissue
B. Identify the tissue
C. Identify the tissue

Answer 38

A. Loost CT
B. Dense Irregular CT
C. Dense Regular CT

Question 39

What are some general functions of white adipose tissue?

Answer 39

1. Energy storage/fat metabolism
2. thermal insulation
3. shock absorption

Question 39

What mode of secretion do sweat glands use?

Answer 39

Apocrine