Epithelial Tissue Flashcards
Where does the apical domain of an epithelial cell face?
exterior surface/lumen of an enclosed cavity or tube
What is endothelium? What is it made of?
lining of blood and lymphatic vessels
made of simple squamous epithelia
What are goblet cells?
mucus-secreting cell found lining intestines and respiratory tract; help protect and collect debris
Where are simple cuboidal cells found?
kidney tubules, glands and associated ducts, terminal bronchioles, covering ovary
What are occluding junctions?
junctions that encircle cells near most apical surface –> can create impermeability of a layer of cells
What are flagella? Where do you find them?
modified motile cilia
sperm tail
What are the 4 types of apical specializations?
cilia, flagella, microvilli, and stereocilia
What are gap junctions?
fluid-filled channels that connect cells and mediate communication
What are nodal cilia?
embryonic, have role in L/R axis determination
Where do you find keratinized stratified squamous cells?
epidermis of the skin
for barrier and protection
What are focal adhesions and hemidesmosomes made of?
integrins
What is the function of simple squamous epithelia?
exchange, barrier, and lubrication
What are motile cilia?
cilia that beat in a wave-like fashion to propel substances across tissue
What are stereovilli made of?
actin - provides rigidity
How do merocrine glands secrete?
secretion delivered in membrane-bound vesicles to apical surface –> exocytosis
What do mucous acini look like in stain?
very light, don’t take up dye
Where are urothelium cells found?
urinary blader, ureters, urethra
Where are pseudostratified columnar ciliate cells?
position of nuclei vary so it looks like multiple layers but is actually 1 layer
for absorption and secretion, debris and particulate movement
Where are simple squamous epithelial cells found? (5)
endothelium, mesothelium, lining alveoli in lungs, loop of henle in kidney, various ducts
What are hemidesmosomes?
intercellular junctions that anchor intermediate filaments to basement membrane
What are simple cuboidal cells? What is their function?
1 layer thick w/ round nuclei that make a tube
absorption, barrier, secretion
What is mesothelium? What is it made of?
lining of serous membranes
made of simple squamous epithelia
Where are nonkeratinized stratified squamous cells found?
oral cavity, portions of pharynx, esophagus, anus, vagina urethra, cornea
basically where there is friction and abrasion not on outermost skin
Where are pseudostratified columnar ciliate cells found?
lining of nasal cavity, pharynx, trachea, bronchi
