Physiology I Block II Flashcards
Part of saliva that begins initial digestion of carbohydrates
Alpha- amylase
Part of saliva that begins initial digestion of lipids
Lingual lipase
Part of saliva that provides lubrication
Mucin glycoproteins
Enzyme in saliva that acts on kininogen to release bradykinin – vasodilator which accounts
for high salivary blood flow during increased salivary activity
Kallikrein
Vitamin B12 binding protein in saliva whos purpose is to protect the transit of this vitamin
Haptocorrin (R protein)
Cells (present in the acini and line the
intercalated ducts) which eject saliva into mouth when stimulated
by neural input
Myoepithelial cells
Cells modify initial isotonic saliva to produce
final hypotonic saliva by altering electrolyte concentrations
Ductal cells
Cells have zymogen granules that contain
amylase
Serous acinar cells
Cells secrete mucin glycoproteins
Mucus acinar cells
Striated duct epithelium is relatively impermeable to
___ but avidly transports ___.
Water, salts
In the salivary striated ducts, the removal of NaCl exceeds the addition of KHCO3,
rendering the final secretion ____, but alkaline.
Hypotonic
At ___ flow rates, the final saliva is most similar to plams
High
At low slow rates (fasting), the final saliva is most ___ to plasm
Dissimilar
Parasympathetic fibers from the glossopharyngeal and facial nerves are dominant in activating ______ receptors to increase IP3/Ca2+ in blood vessels of salivary glands
Cholinergic muscarinic
Sympathetic stimulation in the salivary glands can cause increase in ____ via (typically) beta adrenergic receptors
cAMP
What type of saliva does sympathetic stimulation result in?
Mucous