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Where is the olfactory epithelium located?
Area of about 5cm in the roof of the nasal cavity
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Describe the cellular composition of the olfactory epithelium.
- Olfactory receptor cells are bipolar neurons whose olfactory cilia extend outward from the epithelium.
- Olfactory receptor cells are surrounded by supporting cells, non-sensory epithelial cells.
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Identify the numbered blanks
- 1: Olfactory receptor cells
- 2: Supporting Cells
- 3: Olfactory Cilia
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Identify the numbered blanks
- 1: Olfactory Epithelium
- 2: Olfactory Bulb
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Identify the numbered blanks
- 1: Olfactory Tract
- 2: Cribriform plate of ethmoid bone
- 3: Filaments of olfactory nerve
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Identify the numbered blanks
- 1: Olfactory Epithelium
- 2: Olfactory Bulb
- 3: Olfactory Tract
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Taste buds are the specific receptors for the sense of taste. They are widely but not _____ distributed in the oral cavity.
uniformly
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____ are the specific receptors for the sense of taste. They are widely but not uniformly distributed in the oral cavity.
Taste buds
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Taste buds are mostly located in ____ but a few are found on the soft palate, epiglottis, pharynx, and inner surface of the cheeks.
papillae
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Taste buds are mostly located in papillae but a few are found on the soft ____, ____, ____, and inner surface of the ____ .
- palate
- epiglottis
- pharynx
- cheeks
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Circumvallate papillae are large, round and arranged in a _-shape formation.
V
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____ papillae are on the side walls of the tongue.
Foliate
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Foliate papillae are on the ____ walls of the tongue.
side
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____ papillae are numerous and mushroom shaped.
Fungiform
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Each taste bud consists of an arrangement of ___ cells and ____ cells, which are both modified epithelial cells.
Gustatory cells (taste cells) are the actual receptor cells.
The microvilli (gustatory ___ ) penetrate the epithelial surface through an opening called a ____ .
- basal
- gustatory
- hairs
- taste pore
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When tasting pure solutions taste sensations can be grouped into one of five qualities:
sweet, sour, bitter, salty, and umami.
-Sweet receptors respond to sugars, saccharine, lead salts and some amino acids.
-___ receptors are activated by hydrogen ion and blockade of K+ or Na+ channels.
-Bitter taste is elicited by alkaloids (caffeine) and other substances such as aspirin.
-Salty taste is due to an influx of metal ions, particularly Na+ through Na+ channels.
-_____taste is elicited by amino acid glutamate, which is responsible for the "meat taste" and monosodium glutamate (MSG).
Sour
Umami
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-Sweet receptors respond to sugars, saccharine, lead salts and some amino acids.
-Sour receptors are activated by ____ ion and blockade of K+ or Na+ channels.
-Bitter taste is elicited by ____ (caffeine) and other substances such as aspirin.
-Salty taste is due to an influx of metal ions, particularly Na+ through Na+ channels.
-Umami taste is elicited by ___________, which is responsible for the "meat taste" and monosodium glutamate (MSG).
- hydrogen
- alkaloids
- amino acid glutamate
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Identify the marked blocks
- 1: Epiglottis
- 2: Palatine Tonsil
- 3: Lingual Tonsil
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Identify the marked blocks
- 1: Foliate Papillae
- 2: Fungiform Papillae
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Identify the marked blocks
- 1: Circumvallate Papilla
- 2: Gustatory (taste) cells
- 3: Taste pore
- 4: Gustatory Hair
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Identify the marked block
Basal Cells
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Name 2 factors other than the smell that influences taste appreciation of foods.
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Gustatory hairs: contact specific ____ in the solution, the taste cells depolarize.
Chemical
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Each taste bud consists largely of a globular arrangement of two types of modified epithelial cells: the _____ or taste cells, which are the actual receptor cells, and ____ cells.
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The long microvilli of the receptor cells penetrate the epithelial surface through an opening called the _____.
Taste pore.
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