Saliva Flashcards
1
Q
What are the main clinical problems that may occur when there is a lack of saliva?
A
- Nursing caries
- Rampant caries
- Xerostomia
- Glossitis
- Oral thrush
- Cracked lips
2
Q
Describe osmotic pressure
A
- The pressure that would have to be applied to a pure solvent to prevent it from passing into a solution via osmosis
3
Q
What is meant by the term Hypertonic?
A
- Having a higher osmotic pressure than another fluid
4
Q
What is meant by the term Isotonic?
A
- Having the same osmotic pressure than another fluid
5
Q
What is meant by the term Hypotonic?
A
- Having a lower osmotic pressure than another fluid
6
Q
Where does modification occur in the salivary glands?
A
in the striated ducts
7
Q
What are acini?
A
blind ended ducts in salivary gland the secrete into the main duct
8
Q
What function does smooth muscle do in salivary glands?
A
- contracts to alter the flow of saliva
9
Q
What is the composition of saliva?
A
- 25% serous
- 5% mucin
- 70% Sero-mucin
10
Q
What is primary secretion?
A
- this occurs within the acini contains - - Amylase - Mucous - Electrolytes
11
Q
What is secondary secretion?
A
Within the striated ducts
- modification occurs
- sodium and chloride are absorbed
- potassium and bicarbonate are released
12
Q
how does the flow rate affect the composition of saliva?
A
- The slower the flow the longer there is for modification to occur
- the faster the flow rate the less time there is for modification to occur meaning the levels of bicarbonate and potassium will be lower
