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Flashcards in Special senses Deck (103)
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1

What are the 5 special senses?

smell (olfactory)
taste (gustatory)
vision
hearing
equallibrium

2

Where are the special senses all found?

in complex sensory organs in the head

3

How does stimuli get converted to nerve impulses?

by special senses

4

What are the 2 categories of senses?

general
special

5

What are the 2 chemical senses?

smell (olfactory)
taste (gustatory)

6

Where do the chemical senses go and what does this account for?

- project to the cerebral cortex and the limbic system
- meaning chemical senses can evoke emotional responses

7

What does the olfactory sense do?

dissolved odorants bind to receptor in the nose and sends impulse to cranial nerve 1 (olfactory nerve)

8

How rapidly does adaptation in the olfactory system take?

- 50% in 1 sec
- complete in 1 min

9

What is the olfactory epithellium?

area of the ethmoid bone with pores(have axons in them) and 10-100 millianreceptors of smell

10

What does the olfactory gland do?

produces mucus

11

The olfactory neurons are the only neurons that do what?

regenerate

12

Olfactory neurones bipolar neuron last how long?

1 month

13

What are basal cells in the olfactory nervous system?

stem cells

14

What is the gustatory sense?

taste

15

What kind of substances bind to taste bud on the tongue, soft palate, larynx?

dissolved chemical senses

16

Where are taste buds?

tongue
soft palate
larynx

17

What are the 5 different classes of taste?

sour
bitter
sweet
salty
umamin (savory taste)

18

What are papillae?

taste buds found on sides of vallate and fungiform papillae
- filiform papillae has nothing to do with taste, increases friction

19

What are taste buds made up of?

- gustatory hairs
- supporting cells
- gustatory receptor cell (life span is 10 days)
- basal cells

20

How many senses are on each receptor cell of a taste bud?

more than 1 of the 5 tastes

21

How are nerve impulses generated on the tongue?

dissolved substances bind to gustatory hairs generating a nerve impulse

22

How quickly does adaptation occur with taste buds?

complete adaptation in 1-5 min

23

Most senses of taste are actually stimulation of _______ receptors.

olfactory (smell)

24

What 2 other elements is taste dependant on?

texture and temperature

25

What are 2 main structure of the eye?

accessory and external structures

26

What are the accessory structures?

conjunctiva
eyelid (palpebra)
tarsal glands

27

What is the conjunctiva (accessory structure)?

mucosa lining lid covering the front of the eye

28

What is the palpebra (accessory structure)?

the eyelid which protects and lubricates

29

Where does the reflex of blinking come from?

medulla

30

What are tarsal glands (accessory structure)?

oily secretion come from tarsal glands and keep lids from sticking together