Epithelial Tissue Flashcards
(22 cards)
What is the basement membrane made up of?
Lamina rara, lamina densa and reticular lamina
What is epithelial tissue derived from?
Endoderm, mesoderm and ectoderm
3 locations of simple cuboidal epithelium
Kidney tubules, bronchioles, secretory cells of glands
Why do brush borders appear blue?
Covered in mucus and mucus stains blue
3 locations of simple columnar epithelium
GI tract, uterus lining, uterine tubes
Function of stratified squamous epithelium
Protective barrier against wear and tear
3 locations f stratified squamous epithelium
Skin, oral cavity, oesophagus
Basal layer cells in stratified cuboidal are
Stem cells and myoepithelial cells
What kind of epithelium is found in the urinary bladder?
Transitional epithelium
2 functions of transitional epithelium
Able to stretch (distend)
Impermeable barrier
Mucosa consists of
Epithelium and it’s basement membrane
Lamina propria
Muscularis mucosa
When swords lines cavities it is called the
Parietal layer
When serosa covers organs it is called the
Visceral layer
What does serosa secrete and what is it’s function?
Serous fluid
Minimises friction
Contains defence cells and lysozyme
Microvilli and cilia contain which types of filament?
Micro villi- actin filament
Cilia- micro tubules
Tight junctions are also called
Zona occludens
What is the difference between zona adherens and desmosomes?
Zona adherens= continuous belt
Desmosomes= scattered adhesion plaques
Give an example of a compound exocrine gland
Salivary
Give an example of a multicellular simple exocrine gland
Sweat and colon
What does an apocrine gland secrete? Eg?
Apical parts of cell are released
Eg mammary gland
What does a holocrine gland secrete? Eg?
Discharge of the whole apoptosis glandular cells
Eg sebaceous glands
What do merocrine glands secrete?
Eg
Exocytosis of secretion from apical surface
Eg salivary gland
