Flashcards in special senses Deck (36)
Loading flashcards...
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
