DSA Epithelial Tissue

Question 1

simple squamous

Answer 1

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

Question 2

simple cuboidal

Answer 2

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

Question 3

simple columnar

Answer 3

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

Question 4

pseudostratified columnar ciliated

Answer 4

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

Question 5

pseudostrat columnar with stereocilia

Answer 5

epididymus
highly developed golgi apparatus
lack microtubules

Question 6

uroepithelium

Answer 6

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

Question 7

nonkeratinized stratified squamous

Answer 7

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

Question 8

keratinized stratified squamous

Answer 8

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

Question 9

stratified cuboidal

Answer 9

found in sweat glands, ovarian follicles, salivary gland ducts

Question 10

apical specialization classes

Answer 10

increase SA for absorption

move substances along epithelia - lumenal or external

Question 11

cilia

Answer 11

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

Question 12

flagella

Answer 12

sperm have them? idk

Question 13

microvilli

Answer 13

increase absorption 20-30x by forming brush border

1mm long with up to 100k present on a single cell

Question 14

stereocilia

Answer 14

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

Question 15

tight junction

Answer 15

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

Question 16

zonula adherens

Answer 16

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

Question 17

macula adherens

Answer 17

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

Question 18

hemidesmosome

Answer 18

link basal domain to basal lamina

intermediate filaments associate with a plaque by integrins

Question 19

gap junctions

Answer 19

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

Question 20

goblet cells

Answer 20

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