Histology of Epithelial Tissues Flashcards
1
Q
2 types of epithelial tissue
A
- Covering (line cavities and cover surfaces)
- Glandular (secretory epithelia cells)
2
Q
General structure of epithelial tissue
A
Cells form cell to cell junctions and adhere to a basement membrane
3
Q
What does the basement membrane prevent?
A
Paracellular transport
4
Q
3 layers of basement membrane
A
- Lamina lucida
- Lamina densa
(2 above collectively = basal lamina) - Reticular lamina
5
Q
Simple vs stratified difference
A
- Simple = 1 cell thick
- Stratified = multiple layers
6
Q
Different shapes of cells
A
- Cuboidal = round, cube shaped
- Columnar = taller and wider
- Squamous = flat
7
Q
Order of naming epithelial tissue
A
-Specialisation- -number- -shape- epithelium
8
Q
Exceptions to typical classification of epithelial tissue
A
- Pseudostratified = appears to have multiple layers, but all cells attach to basement membrane
- Transitional = top layer of cells can change shape
9
Q
Different sides of an epithelial cell and what they do
A
- Apical side = specialisations (eg. microvilli)
- Basal side = anchors cell to basement membrane, allows nutrients and innervation
- Lateral side = connects cells by cell to cell junctions
10
Q
Types of cell junction
A
- Tight junction (zonula occludens)
- Adherens junction (zonula adherens)
- Communicating junction (gap junctions)
- Desmosome
- Hemidesmosome
11
Q
What is keratinisation?
A
- Excess keratin production in cells
- Cells die and leave keratin behind
- Keratin forms a protective layer (waterproof)
