Histo of Taste and Olfaction Flashcards
What type of epithelium lines the nasal vestibule?
Keratinized stratified squamous epithelium
What are the hallmarks of olfactory mucosa?
Dramatically thicker than respiratory epithelium (still pseudostratified ciliated columnar)
Lacks goblet cells
What is the function of the olfactory glands?
Serous secretions that dissolve odorant molecules
Make up for lack of mucus from goblet cells
What cells have specialized, nonmotile cilia with odorant receptors?
Olfactory receptor cells
What layer of mucosa in the oral cavity contains the neurovasculature?
Papillary layer of lamina propria
If the submucosal layer is present in the oral cavity, what does it contain?
Loose CT, adipose tissue, salivary glands
What epithelium makes up the masticatory mucosa?
Keratinized and/or parakeratinized stratified squamous epithelium
What kind of mucosa is found on the hard palate, gingiva, and dorsal surface of the tongue?
Masticatory mucosa
What is the purpose of rete ridges and papillae in masticatory mucosa?
Allows mucosa to stay firmly adhered to connective tissue beneath it
Where is lining mucosa found?
Lips, cheeks, alveolar mucosal surface, floor of mouth, inferior surfaces of the tongue, soft palate
What type of oral mucosa would have a distinct submucosa?
Lining mucosa
What type of epithelium makes up lining mucosa?
Nonkeratinized stratified squamous, may be parakeratinized in some sections
What are the 3 layers of the epithelium of lining mucosa?
- Stratum basale
- Stratum spinosum
- Stratum superficiale
What sense is the oral specialized mucosa associated with?
Taste
Where is the oral specialized mucosa located?
Dorsal surface of the tongue
What type of oral mucosa contains papillae and taste buds?
Oral specialized mucosa
What type of epithelium makes up oral specialized mucosa?
Keratinized epithelium
What lingual papillae do not contain taste buds?
Filiform papillae
What is the function of the filiform papillae?
Move food towards pharynx for swallowing
Give dorsal surface of tongue velvety texture
What structure is this?
Filiform papillae
What structure is this?
Foliate Papillae
Where are foliate papillae generally found on the tongue?
Posterior lateral regions
What structure is this?
Fungiform Papillae
What structure is this?
Circumvallate Papillae
What type of lingual papillae are few in number, located posteriorly, with hundreds of taste buds?
Circumvallate papillae
Taste buds are located in what layer in structures that are not part of the tongue?
Mucosa (of glossopalatine arch, soft palate, posterior surface of epiglottis, posterior wall of pharynx)
What is the role of neuroepithelial cells in the taste buds?
Elongated cells extending from basal lamina of epithelium to the taste pore
Synapse with afferent sensory neurons of CN VII, IX, or X
What structure is this?
Taste bud
What sensations do the taste buds on the palate primarily detect?
Bitter and sour
What structure attaches bone to the cementum of the tooth?
Periodontal Ligament
What substance holds the enamel rods together?
Interprismatic material
Where are dentinal tubules found?
Radiating from pulp chamber to enamel rods
Where would Lines of Retzius be found?
In the enamel
What structure is this? What are the structures labelled?
