CellStructure and Acinar Mechanisms

Question 1

constituents of saliva

Answer 1

water
inorganic
organic

Question 2

what are the series of ducts

Answer 2

secretary
striated
intercalated
acinus

Question 3

what are the secretary end pieces

Answer 3

pyramidal shaped cells which are polarised for function

Question 4

what are the types of acing cells

Answer 4

serous
mucous
mixed

Question 5

what is the structure of serous acini

Answer 5

pyrMID

MANY CELLULAR COMPS INSIDE

Question 6

what is the structure of mucous acinus

Answer 6

columnar
nuc squeezed at basal lamina
filled with mucous granules

Question 7

what is an sp strutter of mixed acinus

Answer 7

serous demilune and mucous cell

Question 8

describe serous acing cells

Answer 8

nuc at basal part
basophilic RER
granular

Question 9

where do serous discharge sec

Answer 9

into tubular lumen via intercellular cannaliculi running between cells

Question 10

what is the cyto like in mucous acing cells

Answer 10

mucin in there

granules dehydrated so expand the released in saliva

Question 11

what is the nucleus like in mucous acinar cells

Answer 11

flattened basal nucleus

Question 12

a serous demilune in a mixed acinus discharges via

Answer 12

intercellular cannaliculi between mucous cells

Question 13

where are myoepithelial cells

Answer 13

on acini and intercalated ducts

Question 14

what are the functions of myoepithelial cells

Answer 14

contractile squeeze secretion
regulate duct lumen diameter
protection of acinus/nitercalated from pressure related damage

Question 15

what are the intercalated ducts structure

Answer 15

low cuboidal cells
large central nucleus
difficult to see
connection only

Question 16

why is the truture of the striated duct about

Answer 16

not present in sublingual glands
columnar
active mod saliva
massive basal imm folds

Question 17

what are the secretary ducts like

Answer 17

collect
large lumen
pseudo stratified

Question 18

when does the secretory ducts become stratified

Answer 18

nar termination

merges with squamous ratified oral mucosa

Question 19

what si the formation of hypotonic saliva

Answer 19

2 phase process

Question 20

what is primary saliva

Answer 20

formation of an isotonic solution in the acinus

Question 21

what si the initial step of saliva form

Answer 21

move sodium and chlorine into lumen of acinus
activation of acinar cell
increase perm of potassium

Question 22

what is stage 2 of saliva form

Answer 22

potassium in ECF activates a sodium potassium chlorine co transporter

Question 23

what is stage three of saliva form

Answer 23

chlorine moves through the apical mem into the lumen

Question 24

what is stage 4 of saliva form

Answer 24

th increased conc of chlorine in the acinar fluid drags sodium to balance the charge

Question 25

what are the conc of sodium chlorine and carbonate in saliva similar to

Answer 25

plasma

Question 26

when is saliva mod

Answer 26

who travelling through the ducts

Question 27

what is stage 2

Answer 27

conversion isotonic to hypotonic solution

Question 28

what does stage 2 entail

Answer 28

active reabs of sodium nd chlorine rom lumen

active sec potassium and carbonate into the lumen

Question 29

where does water stay

Answer 29

in the lumen as duct is impermeable t water

Question 30

what is the sec of sodium into saliva like

Answer 30

at low flow rate = low
high flow rate = high
sec at constant rate but when goes too fast saliva sec, the sodium is sec trying to keep up… at excess

Question 31

what secrets the organic components of the saliva

Answer 31

acini cells

Question 32

explain he synthesis of the organic components of saliva

Answer 32

formation peptides
post translational glycosylation of peptides
process and pack
form condensed vacuoles

Question 33

what is the means of saliva sec

Answer 33

merocrine

exocytosis

Question 34

what are another 2 main secretary mechanism

Answer 34

apocrine - loss part cell

holocrine - loss of whole cell (sebaceous glands)