Epithelial Tissues Flashcards
Simple squamous cells: function and examples
diffusion
ex. lining of vessels and heart, lung air sacs
Simple cuboidal cells: function and examples
transportation in and out of lumen and extracellular environment
ex. nephrons, some glands and their ducts
Simple columnar cells: function and examples
absorption and secretion
ex. lining of GI tract, gallbladder, small bronchi, uterine tubes, portion of uterus; some glands
Stratified squamous cells: function and examples
protection (lining exposed to “outside; frequent shedding)
ex. skin, lining of oral cavity and esophagus, lining of vagina
Pseudostratified epithelia have __ layer(s) of cells attached to __.
single; BM
Transitional epithelia have __ layer(s) of cells
multiple (specialized stratified)
Pseudostratified epithelia found in __.
upper respiratory tract
The urinary system is composed of __ cells.
appearance: full and empty?
transitional
full - simple squamous
empty - stratified cuboidal
The lining of vagina is composed __ (cells)
stratified squamous cells
The lining of the upper respiratory tract is __ (cells)
pseudostratified epithelia
Classify below junctions into two: (which are anchoring junctions)
zonulae adherentes
tight junction
desmosome
gap junction
stronger anchoring junctions:
zonulae adherentes, desmosome
weaker:
tight junction, gap junction
all junctions have __ proteins but strong junctions also have __ and __.
transmembrane proteins;
anchoring proteins, filaments
transmembranes cadherins, connexon, integrin: which junctions do they belong to?
cadherin: zonulae adherentes
connexon: gap junction
integrin: hemidesmosome
Compare and contrast the two strong anchors
both have cadherins and anchoring proteins
zonulae adherentes: actin filament
desmosome (stronger): keratin (intermediate) filament
tight junction is depenedent upon __ ion
Ca2+
