Saliva

Question 1

FUnctions of saliva

Answer 1

-moistens, softens, lubricates
-partially digests food
(main salivary enzymes): amylases-starch; lipases-lipids
-Anitbacterial action lysozyme - keeps oral bacteria pop down
-Thermoregulation
-Grooming

Question 2

Major salivary glands include

Answer 2

sublingual
mandibular
parotid

Question 3

Control of salivation

Answer 3

CNS/ANS
-stimulate by Ach
-inhibited epinephrine and norepinephrine
Natural Stimuli
-food in mouth; smell of food
-CNS (nausea, hunger)
-Enteric reflexes (irritating foods in stomach, etc)

Question 4

Acini in salivary glands secrete?

Answer 4

mucus
enzymes
electrolytes
water

Question 5

Composition of saliva

Answer 5

Na & CL

• present in saliva
• salivary gland collecting duct cells reabsorb both
• secrete K and HCO3

Question 6

Saliva is _____ and pH is ______to alkaline

Answer 6

hypotonic

neutral

Question 7

Composition of saliva is affected by

Answer 7

hydration status
-aldosterone causes and increase in Na reabsorption from salivary glands
Type of salivary gland
-parotid: mostly seroud
-other glands secrete a mucous salvia , or have mixed type of secretion

Question 8

Ruminants

Answer 8

• parotid secretion is voluminous and alkaline

- important buffer for rumen contents

Question 9

Movements of the stomach controlled by?

Answer 9

• ANS reflexes
• ENS reflexes
• gut hormones

Question 10

The simple stomach has two parts

Answer 10

proximal part : storage

distal part