Epithelial Tissue

Question 1

Adherins Junctions Structure?

Answer 1

Plaque –> Catenins –> Catenins –> Plaque
(no filament attachment).
Plaque made from glycoproteins.

Question 2

Connexons Structure?

Answer 2

2 connexins form a channel = connexon.

Small molecules can pass through.

Question 3

How big a molecule will connexons allow to pass through?

Answer 3

1 kDa

Question 4

Desmosome structure?

Answer 4

intermediate filament(keratin) - plaque - catenin
keratin spans the entire cell so strong and can prevent pulling apart.

Question 5

Tight Junctions structure?

Answer 5

occludin and claudins “sew” cells together

Question 6

Where are Tight junctions found?

Answer 6

gut, bladder, stomach

Question 7

what do adherens junctions do

Answer 7

prevent cell separation.

Question 8

hemidesmosome structure

Answer 8

BM - laminin - integrin - plaque - keratin

Question 9

what do desmosomes do

Answer 9

prevent pulling apart

Question 10

Basment membrane layers

Answer 10

reticular (bottom) and basal (top)

Question 11

what is the basal laminar secreted by?

what does it contain?

Answer 11

epithelium

collagen + glycoproteins/proteoglycans + laminin (as it attaches via hemidesmosomes)

Question 12

what is the reticular laminar secreted by?

what does it contain?

Answer 12

fibroblasts

fibrous molecules - fibrinogen and collagen

Question 13

what are the 2 specialised types of simple squamous epi?

Answer 13

mesothelium - lines pleural cavities to form serous membranes e.g. pertoneum, pericardial, pleural cavities.
endothelium - lines blood and lymphatic vessels - transport vessels.

Question 14

where are simple cuboidal epithelial tissue found?

Answer 14

pancreas
thyroid
retina
kidney tubules (distal and proximal)
ovary lining

Question 15

where can we find simple columnar tissue?

Answer 15

ciliated:
fallopian tubes
lower respiratory tract - bronchioles
CSF - central canal of spinal cord
non ciliated:
gut
gall bladder
ducts

Question 16

where can we find simple squamous

Answer 16

lung alveoli
kidney glomurulus
blood vessels (specialised)
cavity lining (specialised)
inside the heart

Question 17

where can we find stratified cuboidal

Answer 17

ducts
sweat glands
esophagal glands
male urethra

Question 18

stratified columnar location

Answer 18

esophagal glands
conjunctiva of eye
urethra
mucosal membrane - covers and lines organs/cavities.

Question 19

pseudostratified columnar location

Answer 19

ciliated
upper airways
non ciliated
larger ducts.

Question 20

apocrine gland examples

Answer 20

mammary glands

sweat glands

Question 21

apocrine gland function

Answer 21

pinches off by exocytosis

Question 22

merocrine gland function

Answer 22

secretory vesicles from golgi

Question 23

merocrine gland example

Answer 23

pancreas

salivary glands

Question 24

holocrine gland example

Answer 24

sebaceous glands

Question 25

holocrine gland function

Answer 25

whole gland ruptures.

Question 26

simple squamous function

Answer 26

diffusion secretion filtration

Question 27

simple cuboidal function

Answer 27

secretion and absorption

Question 28

simple columnar function

Answer 28

motility (ciliated) | secretion and absorption (non ciliated)

Question 29

stratified cuboidal function

Answer 29

secretion absorption protection

Question 30

stratified columnar function

Answer 30

secretion and absorption

Question 31

simple tubular example

Answer 31

intestinal glands

Question 32

simple acinar example

Answer 32

penile urethra

Question 33

simple coiled tubular

Answer 33

sweat glands

Question 34

simple branched acinar

Answer 34

sebaceous glands

Question 35

simple branched tubular

Answer 35

gastric glands

Question 36

compound tubular

Answer 36

cowper's glands (male repro system)

Question 37

compound acinar

Answer 37

mammary glands

Question 38

compound tubuloacinar

Answer 38

pancreas