EPITHELIAL TISSUE Flashcards
1
Q
lines the lumen of tubular organs, body cavities, externally covers the body and the organs
A
Surface Epithelium
2
Q
forms glandular tissue
A
Glandular Epithelium
3
Q
all substances that enter or leave tissues and organs must cross through_____
A
Epithelium
4
Q
Functions as covering, lining and protection for surfaces
A
Epithelium
5
Q
Contractile and has sensory cells
A
Epithelium
6
Q
Avascular
A
Epithelium
7
Q
small amout or no Extracellular Matrix
A
Epithelium
8
Q
Cells are compact with few intercellular spaces
A
Epithelium
9
Q
external surface
skin, cornea, mouth areas
A
ectoderm
10
Q
digestive tract, liver, gallbladder, urethra
A
Endoderm
11
Q
heart, blood, lymphatic vessels, serous cavities, male and female reproductive system
A
Mesoderm
12
Q
deepest layer
A
basal lamina/basal surface
13
Q
meshwork of type IV collagen and laminin
A
basal lamina
14
Q
is basal lamina clear in LM?
A
No
15
Q
electron lucent layer made up of glycoprotein laminin
A
lamina rara externa/lamina lucida
16
Q
electron-dense made up of collagen type IV
A
lamina densa
17
Q
electron lucent layer made up of collagen type VII
A
lamina rara interna
18
Q
thicker than basal lamina
A
reticular lamina
19
Q
other name for reticular lamina
A
lamina fibroreticularis
20
Q
other name for basal lamina
A
basal surface
21
Q
contains types III and VII collagen
A
reticular lamina/lamina fibroreticularis
22
Q
product of connective tissue
A
reticular lamina
23
Q
serves as attachment, filter, guide, compartment
A
lamina fibroreticularis/ reticular lamina
24
Q
anchors the epithelium to underlying connective tissue, where the capillaries reside
A
basement membrane
25
what makes up basement membrane of epithelium?
basal lamina and lamina fibroreticularis
26
one layer of EC on the Basement membrane
simple
27
more than one layer of cells
stratified
28
flat, nucleus is flat
squamous
29
square, nucleus is round and central
cuboidal
30
tall and thin, nucleus is located basally
columnar
31
mover
cilia
32
increase surface area for absorption
microvilli
33
structural CHON that protects epithelial cells from stress and damage
-water insoluble
keratin
34
one layer, flat, scale like, and nucleus is flat
Simple squamous epithelium
35
funx: diffusion, filtration, lubrication
simple squamous epithelium
36
one layer cubed cells, centrally located oval nuclei
simple cuboidal epithelium
37
funx: absorption and secretion
simple cuboidal epithelium
38
location: cross-section of distal tubule from a nephron, sweat glands
simple cuboidal epithelium
39
one layer, tall and thin cells, nuclei is narrow or at the base
simple columnar epithelium
40
funx: absorption and secretion
simple columnar epithelium
41
often lined with microvilli and cilia
simple columnar epithelium
42
located in the GI Tract, airways of the bronchi, uterus, uterine tube
simple columnar epithelium
43
more than one layer of EC, only one layer touching the basement membrane
stratified squamous epithelium
44
funx: protects the underlying tissue from abrasion
stratified squamous epithelium
45
some cells have keratin
stratified squamous epithelium
46
dry and impervious to water
keratinized stratified squamous epithelium
47
location of keratinized stratified squamous epithelium
epidermis
48
located in the vagina/esophagus
nonkeratinized stratified squamous epithelium
49
stretches and permits dissension of urinary organ
transitional or urinary epithelium
50
located on the urinary system
transitional epithelium
51
also called urinary epithelium
transitional epithelium
52
has umbrella cells
transitional epithelium
53
looks like more than one layer but every cell is anchored to BM
pseudo-stratified columnar epithelium
54
falsely stratified columnar epithelium
pseudo-stratified columnar epithelium
55
funx: secretion
| mainly mucus
pseudo-stratified columnar epithelium
56
cells that secret mucus
goblet cells
57
located in the trachea and upper bronchial tree
pseudo-stratified columnar epithelium
58
respiratory epithelium
pseudo-stratified columnar epithelium
59
may be visible as brush or striated borders
microvilli
60
aka "brush border"
microvilli
61
30x more space for absorption, surface of epithelium
microvilli
62
consists of actin filaments
microvilli and stereocilia
63
found in the kidney, GI tract, and enterocytes of small intestines
microvilli
64
Apical Modifications
* microvilli
* cilia (kinocilia)
* flagella
* stereocilia
65
the movers
cilia
66
clear in LM, larger projecting structures
cilia
67
for motility
cilia
68
propel material along an epithelial surface
cilia
69
found in respiratory epithelium
cilia
70
long cilia
flagella
71
only cell type with flagellum
spermatozoon
72
tail
flagella
73
propel the cell along the female genital tract
flagella
74
long microvilli
stereocilia
75
non motile, and consists of actin filaments
stereocilia
76
increases the cell's surface area
stereocilia
77
motion-detecting function of inner ear sensory cells
sterreocilia
78
lateral modifications
* zonula occludens
* zonula adherens
* desmosome
* gap junctions
79
forms a seal between adjacent cells
zonula occludens
80
surround apical ends of cells
zonula occludens
81
prevent paracellular passage of substance and proteins to move basally and laterally
zonula occludens
82
below zonula occludens
zonula adherens
83
strong attachment and hold epithelial cells together
zonula adherens
84
encircle epithelial cells
zonula adherens
85
below zonula adherens
desmosome
86
scattere or spot-like attachments
desmosome
87
forms a band
zonula occludens and zonula adherens
88
forms button/rivet like arranged in line
desmosome
89
only junctional present in the skin
desmosome
90
points of cell contact
gap junction
91
channels
gap junctions
92
passage of small molecules from one cell to another
gap junction
93
basal modification
* hemidesmosome
* basal infolding of plasmalemma
94
half a desmosome
hemidesmosome
95
attached to basal lamina
hemidesmosome
96
found in some segments of renal tubule
basal infoldings of plasmalemma
97
lacks ducts
endocrine glands
98
secretes hormones to blood, target celles, tissue, and organs
endocrine glands
99
located where secretions are released, blood, lymph vessels
endocrine glands
100
with ducts
exocrine glands
101
location where secretions are released, surface epithelium and sweat glands
exocrine glands
102
classifications of exocrine glands according to number of cells
* unicellular glands
* multicellular glands
103
single secreting cell
unicellular gland
104
cup shaped columnar cell
goblet cell
105
secretory surface epithelium
secretory epithelial sheet
106
e.g ependyma, choroid plexus
secretory epithelial sheet
107
small orifice, serves as a duct
intraepithelial gland
108
most complex; true ducts
exocrine glands with ducts
109
invagination of surface epithelium
exocrine glands with ducts
110
retain the ducts in surface epithelium even when fully formed
exocrine glands with ducts
111
classification of exocrine glands according to morphology
* simple gland
* compound gland
* tubular gland
* alveolar gland
112
ducts not branched
simple glands
113
two or more branches of ducts
compound glands
114
short, long, coiled
tubular gland
115
round, sac-like, basket-like, branched
acinar
116
compound glands:
* tubular
* acinar (alveolar)
* tubuloacinar
117
classification of exocrine glands according to secretion:
* serous secreting
* mucus secreting
118
viscous secretion containing mucin
mucus secreting glands
119
thin water secretions containing enzymes
serous secreting glands
120
classification of exocrine glands according to mode of secretion
* merocrine glands
* holocrine glands
* apocrine glands
121
classification of exocrine glands according to mode of secretion
* merocrine glands
* holocrine glands
* apocrine glands
122
most common mode of secretion
mesocrine glands
123
most common mode of secretion
merocrine glands
124
exocytosis at apical ends of the cell
merocrine glands
125
fate of cell: intact
merocrine glands
126
fate of cell: complete cell disruption
holocrine glands
127
accumulation of apical portions
apocrine glands
128
accumulation of apical portions
apocrine glands
129
fate of cell: released together with secretory product
apocrine glands
130
basket cells
myoepithelial cells
131
known as stellate cells
myoepithelial cells
132
contractile and contains actin
myoepithelial cells
133
propel secretions towards the main duct and prevents damage to the cell
myoepithelial cells
