CONNECTIVE TISSUE Flashcards
A. Identify the cell
B. Identify the fiber
A. Reticular cell
B. Reticular fiber
A. Reticular fibers (colagen type-III fibrils) are synthesized by ?
B. What is the physiological function of reticular fibers in the lymph node?
A. Reticular cells
B. to form a meshwork in lymphatic tissues. Creates a sponge like structure within which cells and fluids are freely mobile
A. Tan to reddish brown color is due to: ?
B. list one function of brown adipose tissue
A. mitochondria and extensive vascularity
B. Heat generation in newborn animals
A. Identify the cell
B. Identify the cell
A. fibroblast
B. fibrocyte
A. Identify the cell
B. List one functuon associated with this cell
A. White adipose (fat) cell
B. Stores fat for energy
A. In mature tendons and ligaments, what type of cells are you more likely to see?
B. List one function associated with the cell
A. fibrocyte
B. Important for maintainng CT matrix
A. Identify the cell
B. Identify the cell
A. Fibrocyte
B. Fibroblast
A. Identify the fibers
B. What type of CT is shown here?
A. Collagen Type-I fiber
B. Dense irregular CT
A. Identify the CT
B. Identify the structure
A. Dense irregular CT
B. Apocrine sweat gland
A. Name one cell that synthesizes CT matrix
B. What is the significance of GAG or proteoglycans?
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
A. Identify the cell
B. List 3 identification features of this cell
A. Plasma cell
B. eccentric nucleus, negative Golgi image, basophilic cytoplasm
A. list 2 chemical substances present in the mast cell granule
B. List a function for each of those chemical substances
A. Heparin and Histamine
B. Heparin: an anti-coagulent. Histamine: a vasodilator
Two cells shown below are cut in cross-section. Based on the staining property of the nucleus, identify two CT cells.
A. Fibrocyte
B. Fibroblast
What are some major functions of CT?
- Provides a matrix that supports body components
- Provides a medium thru which metabolites are exchanged
- Storage of energy (fat tissue)
- Defense/protection (immune cells)
- Repair after injury
What is the role of a fibroblast?
to produce extracellular matrix (ECM) of the CT
What color does a fibroblast nucleus stain? Why?
Lightly basophilic. The nucleus is euchromatic.
What color does a fibrocyte nucleus stain? Why?
dark blue (strongly basophilic). The nucleus is heterochromatic
Macrophage major functions are ?
to phagocytize foreign and dead cells
to secrete substances that participate in defense and repair mechanisms
Identify the cell
Macrophage
Major identificators of a plasma cell?
- Nucleus is round or oval and pushed to the side
- Cytoplasm is basophilic with a pale staining area adjacent to it (the Negative Golgi Image)
Major function of a plasma cell?
To synthesize antibodies
What are the two main components of the ECM?
Protein fibers and proteoglycans
What are the 3 types of protein fibers found in the ECM?
- Collagen fibers
- Retiular fibers
- Elastic fibers
What is the most abundant protein in the animal body?
collagen type-I
Which cells produce collagen type-I?
Mainly fibroblasts
sometimes fibrocytes
Collagen type-I forms ?? bundles when compared to other types of collagen
thick bundles
Reticular fibers are made of collagen type-??
collagen type-III
Where do you find reticular fibers?
they form meshwork in blood-forming organs
Where do you find elastic fibers?
present in organs that require elasticty in addition to tensile strength
What is the most abundant form of CT?
Loose CT
Loose CT has a high ratio of ?:?
cells:collagen fibers
Is loost CT more or less restistant to stress compared to dense CT?
less resistant to stress
Dense CT has a high ratio of ?:?
collagen fibers (type I):cells
Where do you find dense CT?
dermis, tendons, ligaments
What type of CT?
Dense Regular CT
Why is the irregular arrangement of dense irregular CT important?
It provides resistance to stress from all directions
Why is the regular organization of collagen type-1 of regular dense CT important?
tendons are able to transmit a great amount of forces in a linear manner
A. Identify the tissue
B. Identify the tissue
C. Identify the tissue
A. Loost CT
B. Dense Irregular CT
C. Dense Regular CT
What are some general functions of white adipose tissue?
- Energy storage/fat metabolism
- thermal insulation
- shock absorption
What mode of secretion do sweat glands use?
Apocrine
