DSA Epithelial Tissue Flashcards Preview

HDM Midterm > DSA Epithelial Tissue > Flashcards

Flashcards in DSA Epithelial Tissue Deck (20):
1

simple squamous

found in lining of blood and lymphatic vessles - endothelium and lining of serous membranes - mesothelium- alveoli , loop of Henle,
function in rapid exchange of substances between blood and tissue
associated with basal lamina

2

simple cuboidal

found in kidney tubules, terminal bronchioles, covering ovary
absorption, secretion, active ion transport

3

simple columnar

found in auditory tubes, uterus, oviducts, stomach, intestines, gall bladder, bile duct
microvili form brush border on apical domain
goblet cells support by releasing mucous to coat microvili
sit on lamina propria

4

pseudostratified columnar ciliated

found in nasal cavity, pharynx, trachea, bronchi
three cell types 1) columnar with cilia 2) basal cells anchored to basal lamina 3) goblet cells secreting mucous

5

pseudostrat columnar with stereocilia

epididymus
highly developed golgi apparatus
lack microtubules

6

uroepithelium

or transitional
found in urinary bladder, ureters, urethra
three cell types 1) dome shaped superficial 2) pyriform shaped intermediate 3) polyhedral basal cells
plaques of uroplakins are found on apical end

7

nonkeratinized stratified squamous

found in mouth, oropharynx, laryngopharynx, esophagus, anus, vagina, urethra, cornea
basal cells specialized for mitotic division - cells of outer layer (differentiating) increase their keratin content
outermost cells retain nuclei

8

keratinized stratified squamous

skin
stratum basale is mitotically active
outer layer cells contain keratin - prevents water loss and chemical and physical insults
outermost cells lack nuclei

9

stratified cuboidal

found in sweat glands, ovarian follicles, salivary gland ducts

10

apical specialization classes

increase SA for absorption
move substances along epithelia - lumenal or external

11

cilia

mobile projections of cytoskeleton made up of microtubules - anchored by basal body
beat in wave like fashion to move stuff over cells

12

flagella

sperm have them? idk

13

microvilli

increase absorption 20-30x by forming brush border
1mm long with up to 100k present on a single cell

14

stereocilia

long, nonmotile microvilli - actin core promotes rigidity
increase SA for absorption/secretion
restricted to male reproductive tract and inner ear

15

tight junction

define cell polarity
control passage of substances between cells
belt-like distro at apical end
associated with actin
claudin and occludin

16

zonula adherens

belt desmosome
anchorange
belt-like distro
actin filaments bound by cadherins and catenins

17

macula adherens

desmosomes
spotlike distro at sites of mechanical stress
associated with intermediate filaments and cadherins
provide strength and rigidity

18

hemidesmosome

link basal domain to basal lamina
intermediate filaments associate with a plaque by integrins

19

gap junctions

connect two adjacent cells with connexons
mediate communication
rapidly spread information - intercellular channels

20

goblet cells

modified columnar epithelial cells
synthesizes and secretes mucous (mucin)
scattered throughout various epithelia