Salivary flow and constituents Flashcards
What are the 3 major pairs of salivary glands?
Parotid
submandibular
sublingual
What cells make up the parotid gland?
99% serous cells
What cells make up the submandibular gland?
mixed: 80% serous cells and 20% mucous cells
serous demilunes
what type of salivary secretion is the sublingual gland?
largely mucous secretions
What minor salivary gland secretes serous saliva?
serous gland of von ebner
What type of saliva does the majority of minor salivary glands secrete?
Mucous secretions
What is the stimulated saliva flow rate
2-4 ml/min
what is the unstimulated salivary flow
0.2-0.5ml/min
At rest, majority of saliva is secreted by what gland? 70%
70% from submandibular gland
When stimulated, majority of the saliva is secreted by what gland? 60%
60% from the parotid gland
What saliva gland did studies find there what a unilateral olfcatory salivary reflex ?
olfactory-submandibular reflex
Serous saliva is mainly secreted from what salivary glands?
Mainly from parotid and submandibular glands
Mucous saliva is mainly secreted by what salivary glands?
sublingual and minor glands
Does saliva flow increase or decrease at night?
decrease
What is the scientific name for a dry mouth/lack of saliva?
xerostomia
What can be the problems associated with xerostomia?
- increased caries
- mucosal infections (esp. fungal)
- pain from oral mucosa
- difficulty chewing, swallowing, speaking
- impaired taste
What % of saliva is H20?
99%
Is saliva hypotonic or isotonic?
hypotonic
What is a cation?
a positively charged ion
what is an anion?
a negatively charged ion
what cation electrolytes are in saliva?
sodium (Na+)
Potassium (K+)
Calcium (Ca2+)
Magnesium (Mg2+)
What anion electrolytes are in saliva?
Chloride (Cl-)
Bicarbonate (HCO3-)
Phosphate (PO4)3-
Thiocyanate (SCN-)
Sulphate (SO2)4-
Fluoride (F-)
Iodide (I-)
Hydroxyl (OH-)
What is the benefit of HCO3- (bicarbonate)
Acts as a buffer
minimises drop in pH around teeth after consumption of sugar/acids
minimises demineralisation of teeth
What is the advantage and disadvantage of supersaturated Ca2+ and PO43-
adv - promotes remineralisation
disadv - mineralisation of plaque = calculus
