D514 Oral Mucosa Exam Questions and Answers |
Verified
mucosa/mucous membrane
moist lining of GI tract, nasal passages, and other body cavities that communicate with the
exterior
2 components of mucosa
covering epithelium and underlying connective tissue (lamina propria)
oral mucosa
-lines the oral cavity
-continuous with skin at the lip and GI mucosa at pharynx
-interface b/w outside work and GI tract
-stratified squamous epithelium
oropharynx
the area directly posterior to the oral cavity
hard palate
bony anterior (front) portion of the palate
soft palate
posterior portion, not supported by bone
anterior and posterior faucial pillar
two folds of tissue in the oropharynx and between them is the palatine tonsils
palatine tonsils
-located on the left and right sides of the throat in the area that is visible through the mouth
-should be symmetrical on examination
,gingiva
dental term for gums
3 tongue surfaces
dorsal surface, lateral border, ventral surface
alveolar mucosa
Mucosa between the mucobuccal fold and gingiva.
3 main functions of oral mucosa
-protection (mechanical forces, surface abrasion, microorganisms)
-sensation (temp, touch, pain, taste buds on tongue)
-secretion (saliva)
lining of oral mucosa
most oral mucosa surfaces lined by non-keratinized stratified squamous epithelium (exceptions
are gingiva, hard palate, and dorsum of tongue with keratinized)
3 classifications of oral mucosa
masticatory, lining, and specialized
masticatory mucosa
-gingiva and hard palate
-keratinized (bc toughest) stratified squamous epithelium
-more pink in color bc keratin masks blood vessels
lining mucosa
-alveolar mucosa, buccal mucosa, labial mucosa, floor of mouth, ventral tongue, soft palate
-nonkeratinized stratified squamous epithelium
, specialized mucosa
-dorsal surface of tongue
-keratinized stratified squamous epithelium + taste buds
what embryonic structure is oral epithelium derived from?
embryonic ectoderm
layers of oral epithelium
-4 layers, but differ depending on keratinized or not
4 layers of keratinized stratified squamous oral epithelium (superficial to deep)
-Come Get Sun Burned
-Stratum Corneum, Stratum Granulosum, Stratum Spinosum, Stratum Basale
4 layers of non-keratinized stratified squamous oral epithelium (superficial to deep)
-Stratum Superficiale, Stratum Intermedium, Stratum Spinosum, Stratum Basale
Stratum Corneum
-outermost layer of keratinized stratified squamous oral epithelium
-keratin or cornified layer
-cells become dehydrated and flattened discs with/without nuclei
Stratum Granulosum
-2nd superfical layer of keratinized stratified squamous oral epithelium
-granular layer bc cells filled with keratohyalin granules, precursor to keratin
-cells flattened
-lamellar granules (lipids) released to form watertight barrier
What layer of keratinized stratified squamous oral epithelium makes the keratin?
Verified
mucosa/mucous membrane
moist lining of GI tract, nasal passages, and other body cavities that communicate with the
exterior
2 components of mucosa
covering epithelium and underlying connective tissue (lamina propria)
oral mucosa
-lines the oral cavity
-continuous with skin at the lip and GI mucosa at pharynx
-interface b/w outside work and GI tract
-stratified squamous epithelium
oropharynx
the area directly posterior to the oral cavity
hard palate
bony anterior (front) portion of the palate
soft palate
posterior portion, not supported by bone
anterior and posterior faucial pillar
two folds of tissue in the oropharynx and between them is the palatine tonsils
palatine tonsils
-located on the left and right sides of the throat in the area that is visible through the mouth
-should be symmetrical on examination
,gingiva
dental term for gums
3 tongue surfaces
dorsal surface, lateral border, ventral surface
alveolar mucosa
Mucosa between the mucobuccal fold and gingiva.
3 main functions of oral mucosa
-protection (mechanical forces, surface abrasion, microorganisms)
-sensation (temp, touch, pain, taste buds on tongue)
-secretion (saliva)
lining of oral mucosa
most oral mucosa surfaces lined by non-keratinized stratified squamous epithelium (exceptions
are gingiva, hard palate, and dorsum of tongue with keratinized)
3 classifications of oral mucosa
masticatory, lining, and specialized
masticatory mucosa
-gingiva and hard palate
-keratinized (bc toughest) stratified squamous epithelium
-more pink in color bc keratin masks blood vessels
lining mucosa
-alveolar mucosa, buccal mucosa, labial mucosa, floor of mouth, ventral tongue, soft palate
-nonkeratinized stratified squamous epithelium
, specialized mucosa
-dorsal surface of tongue
-keratinized stratified squamous epithelium + taste buds
what embryonic structure is oral epithelium derived from?
embryonic ectoderm
layers of oral epithelium
-4 layers, but differ depending on keratinized or not
4 layers of keratinized stratified squamous oral epithelium (superficial to deep)
-Come Get Sun Burned
-Stratum Corneum, Stratum Granulosum, Stratum Spinosum, Stratum Basale
4 layers of non-keratinized stratified squamous oral epithelium (superficial to deep)
-Stratum Superficiale, Stratum Intermedium, Stratum Spinosum, Stratum Basale
Stratum Corneum
-outermost layer of keratinized stratified squamous oral epithelium
-keratin or cornified layer
-cells become dehydrated and flattened discs with/without nuclei
Stratum Granulosum
-2nd superfical layer of keratinized stratified squamous oral epithelium
-granular layer bc cells filled with keratohyalin granules, precursor to keratin
-cells flattened
-lamellar granules (lipids) released to form watertight barrier
What layer of keratinized stratified squamous oral epithelium makes the keratin?
