EXAM 3 Starts: Oral Cavity and Tooth development- Part 1 Flashcards by Olivia Bellantoni

what is the oral cavity bound with superiorly

hard and soft palate

How well did you know this?

Not at all

Perfectly

what is the oral cavity bound by inferiorly

tongue and floor

How well did you know this?

Not at all

Perfectly

what is the oral cavity bound by anterior and laterally

teeth

How well did you know this?

Not at all

Perfectly

what is the oral cavity bound by posteriorly

oropharynx

How well did you know this?

Not at all

Perfectly

what is the vestibule

area enclosed between lips and teeth

How well did you know this?

Not at all

Perfectly

what is the vermillion border

transitional zone between external haired skin and internal oral mucosa

How well did you know this?

Not at all

Perfectly

what is the color of the lips derived from

highly vascular dermis and thin overlying keratinized epidermis

How well did you know this?

Not at all

Perfectly

what glands do lips lack

sweat and sebaceous glands

How well did you know this?

Not at all

Perfectly

why are lips highly sensitive

lots of sensory innervation

How well did you know this?

Not at all

Perfectly

what is the function of the oral cavity

ingestion, fragmentation, and moistening of food
-speech, facial expression, sensory perception and respiration

How well did you know this?

Not at all

Perfectly

what is mastication

cutting, chewing, grinding of food by occlusal surfaces of teeth

How well did you know this?

Not at all

Perfectly

what is mastication assisted by

lips, tongue, and salivary glands that form a bolus for swallowing

How well did you know this?

Not at all

Perfectly

what is another word for swallowing

deglutition

How well did you know this?

Not at all

Perfectly

what are the three types of oral mucosae

-lining mucosa
-masticatory mucosa
- specialized mucosa

How well did you know this?

Not at all

Perfectly

describe the lining mucosa and where its found

non-keratinized mucosa found on inner cheeks, floor of mouth inferior surface of tongue and soft palate

How well did you know this?

Not at all

Perfectly

what does the lining mucosa lack

stratum corneum

How well did you know this?

Not at all

Perfectly

where is the masticatory mucosa

in areas of high abrasion such as gingiva and hard palate

How well did you know this?

Not at all

Perfectly

what type of epithelium lines the masticatory mucosa

keratinized or parakeratinized

How well did you know this?

Not at all

Perfectly

where is specialized mucosa located and what type of epithelium

restricted to dorsal surface of the tongue, keratinized

How well did you know this?

Not at all

Perfectly

describe the tongue

muscular organ composed of interlacing skeletal muscle fibers

How well did you know this?

Not at all

Perfectly

what is function of the tongue

manipulation of food and sensation of taste

How well did you know this?

Not at all

Perfectly

what glands are on the tongue and where

accessory salivary glands within lamina propria and between muscle layers

How well did you know this?

Not at all

Perfectly

what cranial nerves innervate the tongue and what are their functions

-5 - general sensation anterior to sulcus terminalis
-7 -taste
-9- general sensation and taste posterior to sulcus terminalis
-10 - taste, motor
-12- motor

How well did you know this?

Not at all

Perfectly

what is the tongue supported by

frenulum

How well did you know this?

Not at all

Perfectly

what is the frenulum

thin band of connective tissue anchoring tongue to floor of mouth

what is the anterior 2/3 of the tongue derived from embryologically

ectoderm

what is the posterior 1/3 of the tongue derived from embryologically

pharynx (mesoderm)

what is the anterior 2/3 and posterior 1/3 of the tongue separated by

sulcus terminalis

what epithelium covers the anterior 2/3 of the tongue and posterior 1/3 of the tongue?

anterior 2/3 - keratinized stratified squamous epithelium posterior 1/3 - non keratinized stratified squamous epithelium

what are the 4 types of lingual papillae

-filiform papillae - fungiform papillae - foliate papillae - circumvallate papillae

describe filiform papillae

keratinized, short bristles, distributed in parallel rows

what is the most numerous papillae

filiform

what is the function of filiform papillae

lacks taste buds so tactile

describe fungiform papillae and where theyre located

mushroom shaped, scattered among filiform papillae

where are the taste buds on fungiform papillae located

dorsal surface

describe foliate papillae and where theyre located

located in furrows/ridges on lateral portion of the tongue

where are taste buds on foliate papillae located

laterally

what salivary glands are located at the base of foliate papillae

von-Ebners glands

describe circumvallate papillae

row of 8-12 large dome shaped papillae

where are circumvallate papillae found

immediately anterior to sulcus terminalis

what are circumvallate papillae surrounded by

moat-like sulcus containing large numbers of taste buds laterally

what salivary glands are associated at the base of circumvallate papillae

von Ebner's glands

where are taste buds located

on papillae of tongue (except filiform), palate, pharynx, epiglottis

what is the function of taste buds

changes in taste with age

what do taste buds contain

oval shaped consisting of 20-30 spindle shaped central taste cells containing terminal taste hairs

what is another word for taste cells

gustatory cells

where are taste hairs located

surface of cell into a central taste pore

what are taste hairs covered with

glycoprotein coat and surrounded by sustentacular cells and basal cells

are taste cells replaced when lost

yes

what are taste cells associated with

myelinated Nerve endings

what cranial nerves innervate taste buds

7,9, and 10

how many receptors for taste does a taste cell have

receptors for only one taste

how many receptors for taste does a taste bud have

taste buds contain a mixture of taste cells

where are bitter taste receptors located

circumvallate papillae

where are umami taste receptors located

circumvallate papillae

what are umami flavored foods

asparagus, tomatoes, beef, cheese and MSG

what AA's do umami taste receptors detect

glutamate and aspartate

what do tasters taste with PTC strips

bitter

what is hypogeusia

decreased ability to detect taste

what is type 1 familial dysautonomia

hereditary condition that results in total absence of taste buds

what is the lingual tonsil and where is it located

lymphoid tissue mass located in underlying mucosa in caudal 1/3

what is the structure and function of lingual tonsils similar to

palatine and pharyngeal tonsils

what is weldeyers ring

all tonsils located in nasopharynx

what is the function of Waldeyers ring

protects respiratory and digestive tract

what is the uvula

extension of posterior free margin of soft palate

what is the central core of the uvula made of

skeletal muscle

what is the uvula covered with

lining mucosa with IG numbers of submucosal glands

what is the function of the uvula

prevents food from entering nasal cavity during swallowing

where are salivary glands distributed

throughout submucosa of oral cavity

what are the 3 pairs of salivary glands

parotid, submandibular, and sublingual

describe the parotid gland and its location

largest gland, located on cheeks, almost completely serous

where is the parotid duct located

opens with vestibule, opposite upper 2nd molar

what is another name for the parotid duct

stenson's duct

where is the sublingual gland located and what type of gland is it

below tongue, mostly mucous

where is the submandibular gland located and what type of gland is it

located inferior and medial to ramus of mandible, mixed gland

where is submandibular duct opening and whats another name for it

opens at sublingual caruncle and called Wharton's duct

what are the accessory glands

lingual, labial, buccal, molar, palatine

describe the morphology of salivary glands

compound tubuloacinar glands

what is the secretory unit of salivary glands

acinus

what surround acini and what do they do

myoepithelial cells aid in secretion of saliva into ducts

what types of acini are in salivary glands

serous or mucous

what are serous acini of mixed glands often in the form of

demilunes

what are intercalated ducts lined by and what do they do

simple cubdoidal epithelium - secrete HCO3 and resorb Cl

what do interacalated ducts empty into

larger striated ducts

what is the epithelium of striated ducts

simple cuboidal to columnar epithelium

what do larger striated ducts empty into

larger excretory ducts

what do larger striated ducts possess

basal striations, due to folding of plasma membrane

what is the function of striated ducts

resorb Na, secrete K into saliva, secrete lysozyme and IgA

what epithelium line excretory ducts

stratified cuboidal or pseudostratifed columnar

what does sympathetic stimulation do

inhibits aqueous secretion which results in thick, viscous saliva rich in protein

what does parasympathetic stimulation do

production of lots of watery saliva

what does saliva contain

water, glycoproteins and proteins, enzymes and antibodies

what enzymes are in saliva and what is their function

- amylase - converts starch to sugar - lysozyme- antibacterial

what do antibodies in saliva secrete

Iga and inorganic ions such as Ca, P and Cl

what are the concentrations of K, Na, and bicarbonate in saliva

high in K, low Na, high in bicarbonate

what is the average saliva production in humans per day

600-1500 ml/day

what are the functions of saliva

-moistens oral mucosa and dry food -provides carrier medium for sense of taste - buffering via high bicarbonate content - digestion of carbohydrates via amylase - immunologic function - secretion of salivary IgA - control of bacterial flora

how does control of bacterial flora in saliva work

- proteins in saliva cover teeth with acquired pellicle - contains antibodies that prevent tooth decay - decreased salivary production exacerbates tooth decay