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22 Cards in this Set
- Front
- Back
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Name the types of lingual papillae
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• FILIFORM
• FUNGIFORM • FOLIATE • CIRCUMVALLATE |
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Explain the association between papillar types and taste buds, and the surface distribution of taste buds
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Filiform keratinized stratified squamous
Fungiform - nonkeratinized stratified squamous Taste buds (5) along apical surface |
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What happens when you lose filiform papillae?
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geographic tongue gross tongue
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Where are the fungiform papillae located?
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1. all over the tongue "super tasters" have more
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Where are foliate papilla located?
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lateral areas of the tongue made of strat squamous epithelium associated with serous glands (vonebners glands)
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Where are circumvallate papilla located on tongue?
What protein do they make? |
7-15 anterior to sulcus terminalis
- surrounded by moat or crypt of mucosa that is lined by stratified squamous nonker epithelium - but 100s found in lateral walls - make protein gland (VEG) protein (ebnerin) that binds taste producing molecules |
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What are taste buds exactly? where are they found?
How many types and how long do they last? |
Ovoid chemoreceptors found in papillae and on the soft palate, posterior pharynx and epiglottis
- 4 cells types lasting 10-14 days |
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What are the 4 types of taste buds?
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1 and 2. supporting
3. Sensory- transmit stimuli 4. Basal- stem cells |
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How can you lose taste buds?
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nerve damage causes disappearance of taste buds
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What part of tongue is for following tastes....
a. sweet b. salty c. sour |
a. tip of tongue
b. posterior and lateral to the tip of the tongue c. anterior dorsum and along lateral margin |
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Where are bitter taste buds?
What is the 5th primary taste? |
posterior side
- umami, linked to L-glutamate and other amino acid |
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What areas register all five modalities of taste?
What are the taste buds mostly registered by the palate |
posterior pharynx and epiglottis
- bitter and sour |
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Development of muscles of the tongue?
- Innervation of the tongue? |
Muscles of the tongue develop from the mesoderm of the occipital myotomes that migrate into the developing tongue, they are innervated by the hypoglossal nerve (CN XII).
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Describe the lining of the nasal cavity?
What type of connective tissue is found and function? |
Lined by pseudostratified columnar epithelium with goblet cells--> roof of nasal cavity upper surface of superior conchae
- Lamina propria contains both serous & mucous glands to moisten inspired air and trap particulate contaminants • Contains mast & plasma cells (IgA, IgE, IgG) • Lamina propria also contains extensive vascular plexus (swell or cavernous bodies) |
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Functions of nasal mucosa?
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1. air hydration-
2. air filtration- conchae interrupt air flow and create turbulance 3. Temperature regulation- superficial vascular plexus in lamina propria can warm or cool air |
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Name the three cell types of olfactory epithelium...
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1. olfactory
2. supporting *sustentacular 3. basal cells |
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What type of sensory neuron are olfactorycells?
Describe the structure |
bipolar sensory neurons
- Dendrite extends to free surface & dilates to form the olfactory vesicle • Projects, along with cilia, above the epithelial surface • Proximal process extends basally, becomes a nonmyelinated axon, and forms bundles of nerve fibers - the fila olfactoria |
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Describe the olfactory cilia...
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From olfactory vesicles- Nonmotile, bent & immersed in
mucous coating the nasal cavity • Contain chemoreceptors which recognize structural differences of odiferous substances • Respond by generating receptor potential |
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Describe the shape, location, and role of the supporting (sustenacular) olfactory cell type
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Columnar cells with oval nuclei (apical one-third of the cell)
• Apical surface has microvilli submerged in seromucous fluid layer • Contain light yellow pigment that gives olfactory epithelium is color • Provide physical support, nourishment & electrical insulation for the olfactory cells |
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Describe the role of the basal cells of the olfactory cells: shape, location, role
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Contact the basallamina but don’t extend to the free
surface • Rounded or coneshaped with centrally-located nuclei • Found in basal 1/3 • Stem cells gives rise to supporting and olfactory cells |
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1. What is the main functions of olfactory epithelium?
2. How is action potential transmitted |
1. perception of oders
2. AP transmitted though fila olfactoria to olfactory bulb synape of glomeruli of 1-30 mitral cells |
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Kallman syndrome has defective gene in ...?
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KAL--1
anosmin-1 |
