Epithelial tissues Flashcards
Epithelial tissues are derived from?…
The three germ layers: Ectoderm, Mesoderm, and Endoderm
Cells exhibit polarity involving two domains, what are they?
Apical domain (contact with the lumen) and basolateral domain (in contact with basal lamina)
Basement membrane consists of what two compartments?
Basal lamina and reticular lamina
To be a type of red stain (not related to Aunt Flo) for carbohydrates,found in the basal lamina, is said to be?…
PAS +
The basal lamina is formed by? Composed of?
Epithelial tissue.
Type IV collagen, fibronectin, laminin, and entactin
The reticular lamina is formed by? Composed of?
Connective tissue.
Argyophilic fibers, reticular fibers, and glycoproteins
Argyrophilic reactions use this chemical to stain what kind of fibers found in the reticular lamina?
Silver nitrate (dark blue or black in color) stains reticular fibers
What are the three functions of the basement membrane?
Selective filtration barrier
Stabilizes the cell structure
Scaffold for embryogenesis and regeneration
Modifications of the apical domain consist of?
Cilia, stereocilia, and microvilli
Lightly keratinized epithelium can be found lining?
Esophagus and vagina
Highly keratinized epithelium can be found?
Covering the epidermis
How will mucus appear on an H&E stain?
Empty or colorless
I line endothelial tissue, the walls of alveoli, bowmans capsule, tympanic membrane, etc…I am?
Simple squamous epithelium
I line kidney tubules, glands, ducts, male urethra, etc…I am?
Simple cuboidal epithelium
I line the upper respiratory tract, uterus, uterine tubes, paranasal sinuses, etc…I am?
Ciliated simple columnar epithelium
I line the digestive tract starting at the cardiac sphincter of the stomach, the gall bladder,…I am?
Non Ciliated simple columnar epithelium
Pseudostratified epithelium with stereocilia is found where?
Epididymis
When describing the functions of epithelial tissues, the height of a cell reflects what?
The levels of secretory or absorptive activity
In Non keratinized stratified squamous epithelium, where are the nuclei present?
The outermost cells
Keratinized stratified squamous epithelium lack what in the outermost layer?
Nuclei
A simple low or high cuboidal epithelium can be found in the thyroid what does the height signify?
Low- non active follicles
High- active follicles
