Upper GI Tract

Question 1

Functions of saliva.

Answer 1

Amylase, digestion.
Mucous, facilitates swallowing.
Lysosomes, protective. 
Solvent to stimulate taste.
Moisturiser to aid speech
Promotes oral hygiene
Bicarbonate neutralises acid

Question 2

Functions of duct cells of salivary glands.

Answer 2

Reabsorb sodium and chloride
Secrete potassium and bicarbonate
Impermeable to water

Question 3

Outcomes of parasympathetic and sympathetic stimulation of salivary glands.

Answer 3

Parasympathetic, serous, rich in enzymes

Sympathetic, mucous

Question 4

Stimulation of saliva production

Answer 4

Simple reflex
Taste, smell, chewing-> pressure receptors-> salivary centre medulla-> autonomic nerves-> salivary glands
Other inputs-> conditioned reflex

Question 5

Name the salivary glands and their secretions.

Answer 5

Parotid, serous.
Submandibular, serous.
Sublingual, mucous.
Simple, mucous.