Smell and Taste Flashcards Preview

ENT Year 2 Medicine > Smell and Taste > Flashcards

Flashcards in Smell and Taste Deck (22)
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1

Describe the structure of a taste bud.

Sensory cells topped with microvilli, support cells are sandwiched either side.

2

How often are sensory cells replaced in a taste bud?

Every 10 days

3

What are the four types of papillae?

Fungiform Filliform Vallale Foliate

4

Of the four papillae which ones contain the most taste buds?

Fungiform Vallale Foliate

5

What nerve supplies taste for the anterior 2/3rds of the tongue?

Chordi tympani - Branch of the VII facial nerve

6

What nerve supplies taste for the posterior 1/3 of the tongue?

Glossopharyngeal CN IX

7

What are the five primary tastes?

Bitter
Sour
Salty
Sweet
Umami

8

What is the umami flavour?

Meaty/savoury

9

What is Ageusia?

Loss of taste function

10

List some causes of ageusia?

Never damage
Irradiation
Smoking

11

What is hypogeusia?

Reduced taste

12

List some causes of hypogeusia

Platinum based chemotherapy

13

What is pysgeusia?

Distortion of taste

14

List some causes of pysgeusia

Glossitis
Tooth decay
Metronidazole

15

What nerve supplies the olfactory cells within the nose?

Olfactory nerve

16

What cranial nerve is the olfactory?

CN I

17

What cells make up the olfactory region of the nose?

Receptor cells
Support cells
Basal cells

18

What is the function of the basal cells?

Secret mucus

19

What is special about the olfactory receptor cells?

They have the only renewable afferent neurones, the neurones can grow back once damaged.

20

Describe a olfactory receptor cell

Extended olfactory rod with cilia on the end.

21

How does sniffing increase your ability to detect scents?

Draws air and the odorants up to the olfactory cells.

22

In order to be detected what do odourants need to be?

Volatile and with a high enough concentration to be detected.