Epi Cell Bio and the Cell Cycle

Question 1

what si epi

Answer 1

tissue of closely packed cells that forms a surface or lines of cavity or tube
line surfaces
protective
secretary

Question 2

how ar epi cells classed num layers

Answer 2

num layers
- one - simple or multi (pseudostratfeid)
2/more - stratified

Question 3

how are epi cells classed by shape

Answer 3

flattened - squamous
cubes - cuboidal
columns - columnar

Question 4

what si the function of oral mucous epi

Answer 4

protect
perm barrier
protect fluid loss

Question 5

what si a standard strutter of epi cell

Answer 5

basla lamina 
hemidesmosome 
desmosome 
keratin filaments
nu c

Question 6

what binds two epi cells together

Answer 6

desmosomes - communications done though this also

Question 7

where is basal lamina

Answer 7

between mesenchyme
and epi
allowing interaction with underlying storm

Question 8

what is cell rpoliferation

Answer 8

an increase in the number of cells asa result of cell growth and cell divison

Question 9

wha kind of epi is oral mucosa

Answer 9

stratified squamous epi

Question 10

wehre is masticatory oral mucosa

Answer 10

gingival and hard palate

keranised

Question 11

whereis lining oral mucosa

Answer 11

floor mouth
buccal regions
oes non keratinised

Question 12

where is some specialised oral muscos

Answer 12

dorsum of tongue

both keratinise and non

Question 13

how does a cell reproduce

Answer 13

by eprfomrig orderly sequence of events which duplicates content then divides into two

Question 14

what is a simple cell cycle

Answer 14

chromosome replication and cell growth

chromo segregation

cell division

Question 15

how si the cells cel ontorlled

Answer 15

timer
order
on off switch 
robustness 
adaptability

Question 16

what re the phases

Answer 16

G1
S
G2
M

Question 17

what are the cell cycle checkpoints

Answer 17

G1 - enviro fave?
G2 - dna rep
M - chromos on spindle

Question 18

what are the phases of interphase onwards

Answer 18

prophase 
metaphase
anaphase 
telophase
cytokinesis

Question 19

what are some cell cycle ‘controllers’

Answer 19

protein kinases
cyclin dept kinases
phosphorylation proteins

Question 20

what are cyclin dept kinases controlled by

Answer 20

CYCLIN

Question 21

what happens to cyclins during cell cycle

Answer 21

circle of synthesis

Question 22

what are cyclin classes

Answer 22

4 classes

• G1/s at end G1 - dna replication
• S bind Cdk’s during s = imitate dna rep
• M - mitosis

Question 23

what si he cyclin complex for cyclin D

Answer 23

G1/Cdk

Question 24

what si he cyclin complex for cyclin E

Answer 24

G1-S CdK

Question 25

cyclins dont only activate cdk but

Answer 25

directs it

Question 26

what si a growth factor

Answer 26

polypeptides that control animal cel grown and diff

store and rel into ECM

Question 27

wat is a transcription factor

Answer 27

protein tha regulates the activity of RNA polymerase

Question 28

what is the proliferation control

Answer 28

receptors
signalling
ECM
phosphorylation

Question 29

what does a cell proliferation unit have

Answer 29

progenitor cells basal cell layer

divide to clusters

Question 30

what is cell cycle cyclin over expression always

Answer 30

phsophsyrlaed

Question 31

what is the guardian of genome

Answer 31

P53

Question 32

what are stem cels

Answer 32

not terminally diff
divide withoutlimt
each daughter cell has a choice