Upper GI Tract Flashcards
0
Q
Functions of saliva.
A
Amylase, digestion. Mucous, facilitates swallowing. Lysosomes, protective. Solvent to stimulate taste. Moisturiser to aid speech Promotes oral hygiene Bicarbonate neutralises acid
1
Q
Name the salivary glands and their secretions.
A
Parotid, serous.
Submandibular, serous.
Sublingual, mucous.
Simple, mucous.
2
Q
Functions of duct cells of salivary glands.
A
Reabsorb sodium and chloride
Secrete potassium and bicarbonate
Impermeable to water
3
Q
Outcomes of parasympathetic and sympathetic stimulation of salivary glands.
A
Parasympathetic, serous, rich in enzymes
Sympathetic, mucous
4
Q
Stimulation of saliva production
A
Simple reflex
Taste, smell, chewing-> pressure receptors-> salivary centre medulla-> autonomic nerves-> salivary glands
Other inputs-> conditioned reflex