Epithelial tissue Flashcards
Term that refers to the unequal distribution of epithelial cells between attached and exposed surfaces
polarity
Epithelial ___ contain blood vessels,
what is the term that refers to this?
Do Not
Avascular
The surface of epithelium that attaches to adjacent tissues
Basal surface
The surface of epithelium that faces open space is q
apical surface
___ inside epithelium continually replace surface epithelial that are damaged or lost
Stem cells
what is the difference between simple and stratified epithelium?
Simple= single layer of cells
Striated= multiple layers of cells
Most delicate epithelium in the body
Simple Squamous epithelium
Simple squamous epithelium that lines body cavities
Mesothelium
Simple squamous epithelium that lines blood and lymphatic vessels
Endothelium
type of epithelium that lines oral cavity, esophogus, rectum, anus, and vagina
Provides protection against abrasions and chemical attacks
Stratified squamous epithelium
What are the 3 classifications based on shape?
- Squamous(flat sheet like)
- Cuboidal (hexigonal Square
- Columnar(hexigonal shape, tall)
The main function of this epithilum is expansion and recoiling after stretch
Transitional Epithelium
This epithelium is important for the lining of nasal cavity, trachea and bronchi and male reproductive tract
main function is protection and secretion
Pseudostratified ciliated epithelium
what is the difference between cilia and microvilli?
Cilia are important for carrying things across a membrane (surface parallel transport)
Microvilli increase surface area for absorption purposes (transcellular transport)
what are the 3 types of exocrine glads and how are they different?
Serous glands- secrete watery enzyme slution
Mucous glands secrete proteins called mucins
Mixed exocrine glands contain both serous and mucous glands
what are the 3 methods of gland secretion? and how are they different?
Eccrine-release products through exocytosis
Apocrine- release products from the shedding of the apical portion of cell
Holocrine- cell bursts releasing products
term for Abnormal Proliferation
cancer
Neoplasia
what is the difference between Endocrine Glands and Exocrine glands
Endocrine- Ductless, hormones, can only effect cells that have receptor for hormone
Exocrine- have ducts, enzymes
what are the 3 types of secretions( cause glands to secrete)
Humoral- different ion levels trigger
Neural- Action potential stimulates
Hormonal- another hormone stimulate
what are the 4 types of intracellular junctions? and what do they do?
Tight Junctions- gatekeepers
Adhering Junctions- support and stability
Desmosomes- support and stability
Gap Junctions- cell to cell communication
How are Adhering Junctions and Desmosomes different?
Adhering junctions are like a “belt” that wrap around cells
Desmosomes are like “snap buttons on jacket”
This word means gland
adeno
adenocarcinoma=cancer of gland cell
mucous is composed of ___ + water
Mucin
refers to normal epithelia from one area is replaced by another form of epithelia not typical to that region
metaplasia
