Cole Histology and Development Flashcards Preview

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Flashcards in Cole Histology and Development Deck (54):
1

Filiform papillae location

most medial aspect of tongue

2

Filiform papillae structure

most abundant

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Filiform papillae function

hold onto food and anything being masticated

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Fungiform papillae location

middle aspect of tongue
lateral to filiform

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Fungiform papillae structure

nonkeratinized stratified squamous

6

Circumvallate papillae location

posterior part of tongue in front of sulcus terminalis

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Circumvallate papillae structure

surrounded by trench

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Circumvallate papillae function

have hundreds of taste buds and where you can suspend food

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Foliate papillae location

side of tongue

10

Foliate papillae structure

have serous glands on top, taste buds in lateral wall

11

Foliate papillae function

not well developed in humans but is in other animals

12

3 components of taste buds

taste receptor, supporting cells, and precursor cells (basal cells)

13

Taste receptor - basal portion

contacts afferent nerve terminal derived from sensory ganglia of the facial, glossopharyngeal and vagus nerves

14

How long do taste buds last?

2 weeks and then remade

15

Supporting cells

immature taste buds that turn into mature taste buds

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Precursor cell- basal cell

give rise to supporting cell

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Ebner's gland location

in connective tissue and in all things that have taste buds

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What 2 papillae is Ebner's glands associated with

foliate and circumvallate

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Ebner's gland secretions

secrete lingual lipase and VEGP

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VEGP

Von Ebner's gland protein

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VEGP function

binds flavorful chemicals and helps pick up and transport food

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Tastents

soluble chemical taken into the taste bud

23

Taste receptor subunits

G protein, a b, y subunits

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Taste receptor function

tastents interact with subunit

25

Location of Taste receptors

apical microvilli of taste receptors

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6 confirmed taste

sweet, salty, sour, bitter, umami, fat

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Location of sweet

tip of tongue

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Sweet flavor

sugars

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Location of salty

posterior and lateral to tip of the tongue

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Salty flavor

sodium

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Location of sour

anterior 2/3 of dorsum and along the lateral margin

32

Sour flavor

acidic, H+

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Location of bitter

posterior, medial tongue

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Bitter flavor

caffeine, morphine, and nicotine

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Location of Umami

Unknown

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Umami flavor

L glutamate and other amino acids

37

What does a fat taste detect

texture of fat

38

Nasal cavity structure - respiratory function

lined with pseudostratified columnar epithelium and goblet cells

39

Lamina propria in nasal cavity

contains both serous and mucous glands to moisten air and trap particles

40

Functions of Nasal mucosa

air hydrations, air filtration, and temperature regulation

41

Air hydration

secrete serous and mucous exocrine glands and goblet cells to moisten the surface of nasal cavity
- add water vapor to inspired air

42

Air filtration

conchae interrupt air flow and create turbulence
matter adheres to conchae and cilia moves it to nasopharynx

43

Temperature regulation

can warm or cool inspired air

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Structure of olfactory epithelium

pseudostratified columnar with 2 types of cells - olfactory cells, supporting cells, and basal cells

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Olfactory cells

bipolar sensory neurons where dendrite extends and dilates to from olfactory vesicle

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Supporting cells of Olfactory epithelium

sustentacular cells, columnar cells with oval nuclei

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Function of supporting cells of olfactory epithelium

provide physical support, nourishment and electrical insulation of the olfactory cell

48

Olfactory bulb

axon terminals connect with synaptic terminals of mitral cells

49

Mitral cells

connect olfactory bulb to make glomeruli

50

Glomeruli

connection between axon terminals of olfactory bulb and mitral cells

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Kallman Syndrome

dont have sense of smell because don't make GnRH --> dont make LH --> dont have gonadal dvpt

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Anosmia for Kallman Syndrome

lack of neurons in the brain (mitral cells) that receive input from olfactory neurons

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Defective gene in Kallman Syndrone

KAL1

54

look at drawing of olfaction process

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