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2MB ENT (My version) > Physiology of Taste + Smell > Flashcards

Physiology of Taste + Smell Flashcards

1
Q

What type of receptors are taste + smell receptors?

A

Chemoreceptors

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2
Q

What are the sense organs of taste?

A

Taste buds

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3
Q

What is the lifespan of sensory taste receptor cells? Which cells are they renewed from?

A

10 days

Renewed from basal cells

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4
Q

Where are the majority of taste buds located?

A

In the papillae of the tongue

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5
Q

What are the 4 types of papillae on the tongue?

A

Filiform
Fungiform
Vollate
Foliate

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6
Q

All the papillae on the tongue have taste bud associations. True/False?

A

False

Filliform papillae do not have taste buds

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7
Q

Which cranial nerves supply afferent taste fibres?

A

VII (facial) - anterior 2/3 tongue
IX (glossopharyngeal) - posterior 1/3 tongue
X (vagus) - pharynx, epiglottis etc.

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8
Q

What are the 5 main types of taste and their stimulants?

A 
Sweet: glucose
Salty: NaCl
Sour: H+ ions
Bitter: diverse - toxins, poisons, alkaloids
Savoury: glutamate, amino acids
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9
Q

What is aguesia?

A

Loss of taste function

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10
Q

List some causes of aguesia

A

Nerve damage

Inflammation - glossitis, radiation, endocrine disorder

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11
Q

What is hypoguesia?

A

Reduced taste function

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12
Q

What is disguesia?

A

Distortion of taste function

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13
Q

Which mucosa is associated with smell?

A

Olfactory mucosa

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14
Q

What are the 3 main types of cell located in olfactory mucosa?

A

Olfactory receptor cells
Supporting cells
Basal cells

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15
Q

What is the lifespan of olfactory receptor cells?

A

2 months

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16
Q

What is the course of the olfactory nerve afferents from the olfactory mucosa?

A

Pierce the cribriform plate of ethmoid + enter olfactory bulb in anterior cranial fossa

17
Q

In order to be smelled, a substance must be what?

A 
Sufficiently volatile (can enter nose with inspired air)
Sufficiently water soluble
18
Q

What is anosmia?

A

Inability to smell

19
Q

What is hyposmia?

A

Reduced ability to smell

20
Q

What is dysmosia?

A

Altered sense of smell

2MB ENT (My version) (12 decks)

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