Lecture 4 Flashcards
What are Epithelia tissue and give 1 example
Look like epithelial tissue, but lack free surface.
Liver cells are one example
What is the Basement made up of, what which stain is + for the basement, and where is this absent?
Type IV collagen and glycoproteins
PAS+
Absent in Lymph Vessels & Hepatic sinusoids
What are the 3 things Reticular Lamina is made of?
Argryophilic (Silver-loving) fibers
Reticular Fibers
Glycoproteins
Where is heavily Keratinized epithelia found?
Skin
Where is Lightly Keratinized epithelia found?
Esophagus & Vagina
What do Stereocilia and MicroVilli have in common?
Both are made up of a core of Actin Microfilaments and Actin-associated proteins
What is the difference between Stereocilia and Microvilli?
Stereocilia are longer, branch, and ends have endocytotic vesicles
Where are 3 general areas Simple Squamous cells are normally found? And also give 3 specific examples.
Lining of Ducts, Blood Vessels, & other tubular structures
Specific examples: Alveoli, Bowman’s Capsule, Labyrinth/Tympanic membrane.
Where are the 8 specific examples that Simple Cuboidal cells are located?
Ovary Retina Kidney Tubules Glands/Ducts Bronchioles Choroid Plexus Lens of eye
give 5 examples where CILIATED Simple Columnar cells can be found
Upper Respiratory Tract Uterine Tubules Uterus Paranasal Sinuses Central Canal of Spinal Cord
Where would NON-Ciliated Simple Columnar be found? 3 examples
Digestive tract with stomach, gall bladder, and excretory ducts of glands
Where is Lightly/Non-Keratinzed Stratified Squamous found? give 5 examples
Esophagus Vagina Lining of Mouth Tongue Epiglottis
Where is Heavily Keratinized Stratified Squamous found? And give 2 examples
Mostly found in the skin (epidermis) with CT Papillae.
Also in Cornea WITHOUT CT Papillae.
What are the 2 locations Stratified Cuboidal is found?
Anal Mucosa & Male Urethra.
What are the 4 locations Stratified Columnar is found?
Ducts of sweat glands
Fornix of eye
Male reproductive tract/urinary tract
Pharynx/Epiglottis
What 2 locations is Ciliated and Stereociliated Pseduostratified Epithelium found?
Ciliated is found in Trachea
Stereocilia in Epididymis
Where is Transitional Epithelium found and what is it called?
Urinary system and is called “Urothelium”
What are 4 general functions of epithelium?
Protection
maintain concentration differences
Absorption
Secretion
What is the function of Simple Columnar?
Secretion of Enzymes/Mucous and Absorption of Nutrients/Fluids
Describe the 3 generalities for Structure of Microvilli (Brushborder)
- Fingerlike projections on apical side
- Non-motile
- Form brush-border across apical membrane
Describe the 2 Functions of Microvilli (Brushborder)
- Primary Function is to Increase Surface Area to increase absorption
- Has Formin that interacts with Barbed ends of actin filaments
What does Formin do?
Regulates assembly of Actin Filaments on Barbed end.
Describe the Structure of Cilium (3 things)
- 9 peripheral Doublets plus central pair of microtubules
- Each doublet: Alpha tubule is 13 protofilaments, radial spokes, and pairs of Dynein arms projecting to Beta-unit of next doublet.
- Beta tubule is 10-11 filaments.
