HIST: Taste + Olfaction Flashcards
What type of epithelium lines the respiratory tract?
Pseudostratified columnar ciliated epithelium
What is the hallmark for olfactory mucosa?
Dramatically thicker + LACKS goblet cells
What types of cells are in olfactory mucosa?
Basal cells –> stem cells
Brush cells –> ciliated
Supporting cells
What dense CT supports mucosa in the oral cavity?
Lamina propria
- papillary layer (superficial + loose)
- dense layer (deep)
What are the divisions for oral mucosa?
- Lining
- Masticatory
- Specialized mucosa
In the oral cavity, what is masticatory mucosa (hard palate) classified as?
Keratinized or parakeratinized stratified squamous epithelium
Where is the lining mucosa found and what is it classified as?
Lining = lips, cheeks, tongue, soft palate
Nonkeratinized stratified squamous epithelium/parakeritinized
What are the 3 layers of the lining mucosa in the oral cavity?
- Stratum basale
- Stratum spinosum
- Stratum Superficiale
What is the specialized mucosa of the oral cavity found on? What does it contain?
The dorsal surface tongue, associated w/ taste
Contains taste buds
What type of epithelia is found on the tongue?
Masticatory + Specialized mucosa
The lingual papilla are associated with?
Taste buds
What are these + function?
Filiform Papillae
Help move food towards the pharynx when swallowing
What are these + function?
Foliate Papillae
Provide taste sensation
What are these?
Fungiform Papillae
What are these?
Circumvallate papillae
What are these?
Lingual papilae
Taste bud has what cells?
Neuroepithelial (sensory) cells connected to taste pore
Supporting cells
Basal cells
What part of the tongue senses bitter?
Posterior
What part of the taste bud senses sour (acidic)?
Lateral
What part of the taste bud senses sweet (sugars)?
Tip of tongue
What part of the tongue senses salty (sodium)?
Anterior + lateral to the tip
What is dentin composed of?
Calcium hydroxyapatite crystals
dentin = in tubules
What is enamel composed of?
Calcium hydroxyapatite rods (prisms) that are connected via interprismatic material
Enamel, dentin, and cememntum are all composed of what?
Calcium hydroxyapatite
what cell is found in dentin?
Odontoblasts
What cell is found in enamel?
Ameloblasts
What cell is found in cementum?
Cementoblasts
Cementum, Periodontal ligament, alveolar bone, and gingiva form?
Periodontium
What ligament lines the alveolus?
Periodontal L.
