510-6

Question 0

mucus

Answer 0

binds to food particles and aids in lubrication and swallowing

Question 1

salivary amylase

Answer 1

digests starch

Question 2

lingual lipase

Answer 2

activated by stomach acid once the food is swallowed and it digests fat

Question 3

histatin

Answer 3

major component in wound repair

Question 4

SLPI

Answer 4

antimicrobial agent important in HIV defense

Question 5

IgA

Answer 5

antibody that neutralizes bacteria

Question 6

lactoferrin

Answer 6

chelates iron so bacteria can’t grow

Question 7

Parasympathetic Stimulation of Salivary Glands

Answer 7

causes the production of serous, watery saliva

Question 8

Sympathetic Stimulation of Salivary Glands

Answer 8

produces a small volume of thick mucus saliva

Question 9

2 main types of salivary glands

Answer 9

minor- located throughout the oral cavity (except gingiva and hard palate)
major- three paired glands stimulated by nerves

Question 10

mucoceles

Answer 10

blockage of minor mucus gland

Question 11

3 major salivary glands

Answer 11

1. ) parotid
2. ) submandibular
3. ) sublingual

Question 12

Parotid

Answer 12

25% of total saliva volume
serous
located in temporal region of head
empties into STENSEN’S DUCT

Question 13

Submandibular

Answer 13

70% of total saliva
mixed- mostly serous
empties into WHARTON’S DUCT next to the frenulum

Question 14

Sublingual

Answer 14

5%
mixed- mostly mucus
empties into BARTHOLIN’S DUCT and DUCTS OF RIVINUS

Question 15

Sialolith

Answer 15

salivary gland stone (most common in Wharton’s Duct)

Question 16

Sjogren’s Syndrome

Answer 16

Autoimmune disorder where the body destroys its own salivary glands

Question 17

pellicle

Answer 17

saliva that covers the tooth. important in bacteria defense.

Question 18

plaque

Answer 18

when the pellicle gets colonized by bacteria

Question 19

calculus

Answer 19

when the plaque calcifies

Question 20

3 main bacterial colonizers of dental plaque

Answer 20

1. ) s. sanguis
2. ) s. mutanns
3. ) a. viscosus

Question 21

2 major types of salivary secretion

Answer 21

1. ) serous

2. ) mucus

Question 22

acinus

Answer 22

cluster of cells arranged in a sphere around a hollow lumen

Question 23

intercalated duct

Answer 23

joins acinus to striated duct. covered by myoepithelial cells. adds lysozymes and lactoferrin to saliva.

Question 24

striated duct

Answer 24

adds bicarbonate to saliva and reabsorbs Na and Cl. striated pattern on tall cuboidal cells

Question 25

serous demilune

Answer 25

during fixation the mucus cells swell leading to serous cells being pushed to the periphery of the acinus

Question 26

myoepithelial cells

Answer 26

found on secretory acini and intercalated ducts. weakly contractile, similar to muscle cells but derived from epithelia

Question 27

primary saliva

Answer 27

isotonic

Question 28

secondary saliva

Answer 28

hyper tonic

Question 29

Salivary protein secretion

Answer 29

NE binds to B andrenergic receptor which leads to a series of secondary messenger cascades (G protein, AC, cAMP) which eventually leads to the exocytosis of the proteins

Question 30

Water and Electrolyte Salivary Secretion

Answer 30

Ach binds to muscarinic cholinergic receptor and NE binds to A andrenergic receptor which signals the intracellular release of calcium. this opens Na and Cl channels in the membrane and tight junctions. Aquaporins are also opened which leads to the movement of water.

Question 31

Secretion of IgA

Answer 31

IgA produced by plasma cells. Epithelia cells produce secretory component that acts as a receptor and binds the IgA and by endocytosis brings it into the epithelial cell and releases it by exocytosis