Taste and smell Flashcards Preview

ENT > Taste and smell > Flashcards

Flashcards in Taste and smell Deck (30):
1

What is the point of taste and smell?

Detect if food is good to eat
Influence flow of digestive juices

2

What is gustation?

Sense of taste

3

What is the organ of taste?

Taste buds

4

Describe a taste bud

Sensory and support cells arranged in segments like an orange

5

How long do taste receptor cells last for?

~10 days

6

Where can taste buds be found?

tongue, pharynx, palate and epiglottis

7

Where are most taste buds found?

Papilla

8

What are the 4 forms of papillae humans have?

Filiform- string like and do not contain tastebuds
Foliate
Fungiform
Vallate

9

What nerves convey taste?

VNII- Anterior 2/3
CNIX- Posterior 1/3
CNX- Everywhere that's not the tongue

10

What are the 5 main tastes and their stimuli?

Salty- NaCL
Sour- H+
Sweet- Glucose
Bitter- Alkaloids etc
Umami- AA like glutamate

11

What is ageusia?

Loss of taste

12

What can cause ageusia?

Nerve damage
Inflammation
Some endocrine disorders

13

What is hypogeusia?

Reduced taste

14

What can cause hypogeusia?

Chemotherapy
Some medications

15

What is dysgeusia?

Distortion of taste

16

What can cause dysgeusia?

Glossitis; gum infections; tooth decay; reflux; upper respiratory infections; medications; neoplasms; chemotherapy; zinc deficiency

17

What is olfaction?

Sense of smell

18

Where is smell sensed?

Olfactory mucosa

19

What cells are found in the olfactory mucosa?

Basal cells
Supporting cells
Olfactory receptor cells

20

What are olfactory receptor cells?

Specialised endings of renewable afferent neurons

21

What are odorants?

Smell molecules that bind to cilia

22

How long to olfactory receptors last.

~2 months

23

What are basal cells used for?

Precursors for new olfactory receptors

24

Where do olfactory nerves pass through?

Cribriform plate

25

What is anosmia?

Loss of smell

26

What can cause anosmia?

Viruses
Allergy
Nasal polyps
Head injury

27

What is hyposmia?

Reduced sense of small

28

What can cause hyposmia?

Similar to anosmia and Parkinson's

29

What is dysosmia?

Altered sense of smell

30

What can cause dysosmia?

Hallucination of smell
Different interpretation