Keratinized cells lose their nuclei and parakeratinized cells keep their nuclei. Parakeratinized nuclei are alive and functional
Both statements true
First true, second false
First false, second true
Both false
The basal layer divides constantly because it is the site of stem cells for the epithelium. All epithelia is vascularized
Both true
Which of the following is incorrect?
Demosomes are found in the prickle cell layer
Hemidesmosomes attach epithelial cells to the basal lamina
Parakeratinized cells can be found in masticatory mucosa
The hard palate has keratinized stratified squamous epithelium
The soft palate is highly vascularized and keratinized
The filiform papillae are keratinized
The fungiform papillae have taste buds
The fungiform and filiform papillae are mostly found towards the midline of the tongue
The Von Ebner glands are found within circumvallate papillae
The circumvallate papillae is filled with saliva
Taste at the anterior 2/3rds of the tongue travel through a branch of the glossopharyngeal cranial nerve. The vagus supplies the posterior 1/3rd.
All taste goes through the solitary nucleus within pons. Then taste will be processed at ventral posterior medial nucleus before ending at the gustatory cortex.
Which of the following is incorrect
Coated tongue is from colonization of bacteria or fungi trapped between small nodules
Leukoplakia is a disorder of the immune system which causes white patches in the mouth.
Oral lichen planus causes lacy white streaks and patches in the mouth and tonuge
Thrush causes sore white plaques via yeast infection
Black hairy tongue is hypertrophy of filiform papillae and possible infection by chromogenic bacteria
Mucoperiosteum has mostly collagen 3 and elastin. The oral mucosa has more adipocytes in its submucosal layer.
The lamina propria has more penetrance into the mucoperiosteum. Mucuperiosteum also has no submucosal layer.
Lining mucosa have many short rete pegs, masticatory mucosa have few tall rete pegs. The projections are for anchoring to the lamina propria
Which of the following is incorrect about age-related change of the oral cavity?
Thinning of epithelium
Decrease of filiform papillae
Decrease of Langerhan cells
Decrease of fibers in lamina propria
Decreased wound healing
Compared to the integumentary skin, the oral mucosa displays a pale color. It has a moist, rough surface.
The roof of the mouth has keratinized, stratified squamous epithelium
The hard palate has unkeratinized stratified squamous epithelium.
The masticatory mucosa features keratinized and parakeratinized stratified squamous epithelium
The cheeks are lined with non-keratinized stratified, squamous epithelium
The soft palate has unkeratinized stratified squamous epithelium.
There are tastebuds in the larynx and pharynx
Waldeyer's ring connects the pharyngeal, palatine, and lingual tonsils
Burton's lines are from lead intoxication
Caviar tongue is caused by varicose veins on the underside of the tongue
Tetracycline has been used to study the growth and development of human teeth
Which of the following is NOT a cell type found in taste buds?
basal cell
stem cell
supporting cell
receptor cell
secretory cell