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Flashcards in special senses Deck (36)
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1

Site of olfactory receptors

In mucosa of superior region of nose

2

Three types of olfactory cells

olfactory receptors
supporting cells
basal cells

3

Consist of olfactory hairs with chemoreceptors
These are first order neurons of olfactory pathway

olfactory receptors

4

Epithelial cells: support, protect

supporting cells

5

. stem cells that produce new neurons (receptors) throughout life.

basal cells

6

Pathway for Olfaction

Olfactory nerves
Olfactory bulb
Olfactory tract
Olfactory cortex

7

Located on tongue, pharynx, epiglottis
In structures called papillae

receptors in taste buds

8

Five primary tastes

salt, sweet, sour, bitter, and umami

9

pathway of tears

Lacrimal glands  lacrimal ducts  surface of upper eyelid  surface of eye 
Lacrimal canals  lacrimal sac  nasolacrimal duct  nasal cavity

10

accessory structures for protection and lubrication (blinking)

eyelids

11

accessory structures for protection from foreign objects and perspiration

eyebrows and eyelashes

12

Formation of Image on Retina: Four Steps

refraction
accommodation
constriction
convergence of eyeballs

13

bending of light rays as they pass from medium of one density to another of different density
Image is inverted but brain adjusts and interprets distance and size

refraction of light

14

Lens adjusts shape for distance to allow image to focus on retina

accommodation

15

For distant objects, ciliary muscle
________, __________ lens

relaxes
flat

16

For closeup vision, ciliary muscle ____, ____ lens

contracts
fat

17

can see near but not far objects

myopia

18

Eyeball is too long so lens cannot accommodate enough to focus images of distant objects onto retina

myopia

19

can see far but not near

hyperopia

20

Eyeball is too short so lens cannot accommodate enough to focus images of near objects onto retina

hyperopia

21

irregular curvature of cornea or lens

astigmatism

22

: aging change  loss of elasticity of lens  farsightedness  reading glasses

presbyopia

23

These disorders can be corrected with

lenses or LASIK

24

LASIK

laser assisted in situ keratumileusis

25

stapes is attached to which window

oval

26

membranous labyrinth is filled with

endolymph

27

Vestibule includes
Two sacs

utricle and saccule

28

Contain membranous semicircular ducts
Each ends in a swelling known as ampulla

semicircular canals

29

membranous, has endolymph
Contains spiral organ (sensory organ for hearing)

cochlear duct

30

sensory organ for hearing

SPIRAL ORGAN

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