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Histology- Epithelium & Glands
WSU CVM Chandra
55
Other
Graduate
10/03/2008

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Term
Is Epithelium vascular?
Definition
No.
Term
Two major forms of epithelium:
Definition
surface, glandular
Term
two types of glandular epithelium:
Definition
endocrine, exocrine
Term
epithelial cells are bound together by
Definition
Term
epithelial cells are arranged
Definition
in sheets
Term
epithelium has how much extra cellular space?
Definition
very little
Term
the basal surface rests on the
Definition
basement membrane
Term
which surface is specialized?
Definition
apical
Term
epithelial tissue displays high or low mitotic activity?
Definition
high
Term
basal lamina
Definition
structural support and selective barrier for epithelium
Term
components of basal lamina
Definition
collagen IV, glycoproteins, proteoglycans secreted by epithelial cells
Term
how is the basal lamina connected with the underlying connective tissue?
Definition
type VII anchoring fibrils
Term
reticular lamina
Definition
layer under the basal lamina composed of reticular fibers from connective tissue fibroblasts
Term
tight junction
Definition
just below apical end of cell. permeability barrier against molecular movement across epithelial sheets.
Term
tight junction
Definition
just below apical end of cell. permeability barrier against molecular movement across epithelial sheets.
Term
belt desmosome
Definition
cadherins between cells
Term
gap junction
Definition
connections between adjacent cells, allow passage of molecules, signaling
Term
spot desmosome
Definition
link cytoskeletons for structural integrity
Term
hemidesmosome
Definition
attach cells to extracellular matrix.
Term
purpose of microvilli
Definition
increase surface area, trap nutrients
Term
stereocilia
Definition
non-motile. Increase surface area.
Term
cilia:
Definition
movement
Term
purpose of surface epithelium (6)
Definition
protection, absorption, excretion, surface transport, digestion, lubrication
Term
where is simple squamous epithelium?
Definition
lining serous cavities: peritoneum, pleura, pericardium (mesothelial); lining heart, blood and lymph vessels (endothelial)
Term
Where is simple cuboidal epithelium found?
Definition
ducts of mammary glands, collecting ducts of kidneys.
Term
Where is simple columnar epithelum found?
Definition
GI tract, genitourinary tract, resp tract.
Term
What are three features of simple columnar epithelial cells?
Definition
nucleus is oval and basal; striated border; ciliated in portions of resp. and urinary tract.
Term
where is pseudostratified epithelium found?
Definition
trachea, tunica fibrosa
Term
Where is stratified keratinized squamous epithelium found?
Definition
in the epidermis.
Term
where is stratified non-keratinized squamous epithelium found?
Definition
in the mouth, esophagous, anal canal
Term
where is stratified cuboidal epithelium found?
Definition
large excretory ducts of glands -- salivary and mammary
Term
where is stratified transitional epithelium found?
Definition
bladder, ureters, part of urethra
Term
In stratified sqamous epithelium, of what type are the deeper layers?
Definition
Cuboidal
Term
Define Gland:
Definition
one or a group of epithelial cells modified to synthesize and secrete molecules into the extracellular space.
Term
exocrine
Definition
products released to surface
Term
endocrine gland
Definition
ductless, products released btween cells, diffuse into capillaries.
Term
glands in the large intestine are
Definition
simple tubular
Term
sweat glands are
Definition
simple coiled tubular
Term
glands in stomach are
Definition
simple branched tubular
Term
sebaceous glands are
Definition
simple branched acinar
Term
glands in the kidney and testes are
Definition
compound tubular
Term
glands in the pancreas and mammae are
Definition
compound acinar
Term
salivary glands are
Definition
compound tubuloacinar
Term
Compound glands contain
Definition
many secretory units that empty into branching ducts.
Term
Serous glands produce
Definition
thin watery stuff
Term
mucous glands produce
Definition
mucus.
Term
goblet cells are
Definition
single celled mucous glands.
Term
in goblet cells, the nuclei are
Definition
pressed to the base by the acidophilic secretory granules filling the cells
Term
Merocrine secretion
Definition
exocytosis.
Term
apocrine secretion
Definition
budding.
Term
holocrine secretion
Definition
rupture
Term
pancreatic acinar cells secrete by what type and mode?
Definition
serous, merocrine
Term
the acinar mandibular salivary glands secrete by what type and mode?
Definition
mucous, serous, merocrine
Term
sebaceous glands secrete by what mode?
Definition
holocrine
Term
sweat glands secrete by what mode?
Definition
apocrine, merocrine
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