salivary flow and constituents

Question 1

what kind of solution is saliva?

Answer 1

hypotonic solution

Question 2

what is the normal volume of saliva a day?

Answer 2

1200ml

Question 3

what glands make the majority of saliva (%)

Answer 3

major- 90%
minor- 10%

Question 4

what minor glands are the only to make serous saliva?

Answer 4

serous glands of von ebner glands

Question 5

what is the normal rest flow rate of salivary?

Answer 5

0.3-.0.5ml/min

Question 6

where is the majority of saliva produced at rest?

Answer 6

submandibular gland

Question 7

what is the normal flow rate of saliva?

Answer 7

2-4ml

Question 8

where is the majority of saliva produced when stimulated?s

Answer 8

parotid gland

Question 9

is there a gustatory salivary reflex?

Answer 9

yes- citric acid(sour) caused an increase in saliva

Question 10

is there a mechanical salivary reflex?

Answer 10

yes- chewing ipsilateral to gland= big increase in saliva
contralateral- increase but small

Question 11

is there an olfactory salivary reflex?

Answer 11

lemon smell-no increase in PG
beef smell- increase in SMgland
- true for SM gland

Question 12

what else causes increase in saliva?

Answer 12

age- increases up to age 15

Question 13

what else causes decrease in saliva ?

Answer 13

drugs, sleep/night/dehydration

Question 14

why does saliva cause mineralisation?

Answer 14

because it is saturated with calcium and phosphate

Question 15

what negative does mineralising factors of saliva have on teeth?

Answer 15

increases calculus formation

Question 16

what does flow rate of saliva in turn increase?

Answer 16

increases the pH

Question 17

what is the purpose of amylase in saliva?

Answer 17

breakdown carbohydrates to starch

Question 18

what inactivates amylase?

Answer 18

stomach acid

Question 19

what is the function of lipase?

Answer 19

breaks down lipids/fats

Question 20

what do mucins make up the majority of?

Answer 20

90% of the pellicle

Question 21

what do mucins coat?

Answer 21

oral and soft tissues

Question 22

what is the function of slatherin?

Answer 22

prevents precipitation of calcium and phosphate- therefore initially reduces calculus formation and prevents mineralisation of saliva stones