Epithelial Tissue Flashcards
Main functions of epithelial tissue (5)
Protection
Trancellular transport (Secretion & Absorption)
Sensory detection
Order of layers in epithelial tissue
(Out)Lumen
Epithelial cells
Basement membrane
(In) CT
3 domains in epithelial tissue
Apical, lateral, basal
Domain that borders lumen
Apical
The apical domain includes what cytoskeletal elements
Microvilli (absorb)
Cilia (movement)
What are the two types of glands present in epithelial tissue?
Endocrine and exocrine
Endocrine glands secrete _____
Basally
What type of epithelial gland has serous v. mucous
Exocrine glands
What is the function of microvilli?
Absorption
(Brush border)
What is glycocalyx?
A sugar coat that extends surface area
(Can be found in kidney)
What is the function of cilia?
They aid in movement
(Wild hair)
What is the function of the lateral domain?
Barrier
Communication
Adherence
(attaches to cell to cell)
Lateral interdigitations _______ surface area.
Increase
The junctional complex is included in which domain?
Lateral domain
What are the three parts of the junctional complex?
Zona occludens
Zona adherens
Macula adherentes
Which two parts of the junctional complex help with adhesion?
Zonal adherens and macula ad
Which part of the junctional complex is the tight junction?
Zonula occludens
(Protective barrier)
Which part of the junctional complex is the intermediate junction?
Zonula adherens
Which part of the junctional complex is the desmosome (“spot Jxn”)
Macula ad
What is not part of the junctional complex but still aids in communication between cells, when open?
Connexons
The intermediate jxn (Z.A) is made up of?
Actin
Desmosome (M.A) is made up of?
Intermediate filaments
Basement membrane separates the epithelial layer from what?
Connective tissue
Basal domain consists of the basal lamina and ___________.
Reticular lamina
How do epithelial cells attach to basal lamina?
Hemidesmosomes
“Spot welds”
Which cell classification is most flat?
Squamous
Cell classification that looks like squares/cubes?
Cuboidal
Tall column like cell classification type?
Columnar
What does stratified indicate in terms of cell classification?
Has more than one cell layer
What does simple indicate in terms of cell classification?
One layer of cells
Pseudostratified columnar cells look like what?
Look like they consist of more than one layer but do NOT
The shape of cell closest to lumen or the outside world will be the name. T/F?
True
Transitional epithelium is present only in the _______
Bladder
(Distensible, Rounded surface)
Glands are created by both epithelial tissue and _______ tissue.
Connective
What part of the gland is formed by epithelial tissue?
Parenchyma
What part of the gland is created by connective tissue?
Stroma
What are the two types of glands
Endocrine
Exocrine
What is the function of an endocrine gland?
Secrete basally
hormones directly into blood stream
What is the function of an exocrine gland?
Secrete apically
Into ducts
(Serous or mucous)
What are goblet cells?
Mucous secreting cells present in both the intestines and the lungs.
