Flashcards in Vision (BIO 181-201) Deck (41)
Loading flashcards...
1
Conjunctiva
-thin, protective mucous membrane
-stratified columnar epithelium
-areolar connective tissue and goblet cells (mucous)
2
palpebral conjunctiva
lines eyelids
extends to cover eye except for cornea
3
bulbar conjunctiva
covers back of eye
4
lacrimal apparatus
-glads and ducts associated with them
-produces fluids and gets rid of excess fluid in a process
5
superior rectus
looks up
oculomotor nerve
6
inferior rectus
looks down
oculomotor nerve
7
lateral rectus
looks laterally
abducens nerve
8
medial rectus
looks medially
oculomotor nerve
9
superior oblique
eye rolls
looks down and laterally
trochlear nerve
10
inferior oblique
eye rolls
looks up and laterally
oculomotor nerve
11
cornea
covers iris
translucent
12
outer cornea
stratified squamos epithelia
13
middle cornea
collage fiber and fibroblasts
14
inner cornea
simple squamos
15
sclera
covers eye (not cornea)
outermost layer
white of eye
dense connective tissue
fibroblasts
collagen fibers
a bit rigid and firm
gives eyeball shape
protects inside structures
attachment for 6 extrinsic eye muscles
16
iris
pigmented with melanocytes
changes size of pupil
between cornea and lens
regulated amount of light
circular and radial smooth muscles
17
pupil
-hole
-black because you can see chorroid (has melanocytes)
18
pigmented retina
1 cell layer thick
next to chorroid
19
neural retina
sensory information
photoreceptors
neural layer
20
lens
proteins
21
crystallins
lens proteins
layers
translucent
cataracts appear when they precipitate
22
anterior chamber
anterior to lens
between cornea and lens
filled with aqueous humor
23
posterior chamber
anterior to lens
between iris and lens
filled with aqueous humor
24
aqueous humor
-always produced
-excess exits in canal of Schelmm to venus circulation (every 90 minutes)
25
vitreous chamber
back of eye
contains vitreous body
26
vitreous body
gel-like
maintains position of retina
formed as embryo
never replaced
27
Rods
sensitive to light
enable to see in low light
no color vision
light scatters in retina
not in macula lueta or fovea centralis
28
rod photopigment
bipolar photoreceptor cells
29
rodopsin
opsin and retinal
forms in dark
reacts to light
30
light and dark adaptation
in light, opsin and retinal break down and come together in the dark to form rodopsin
31
bleaching
going from dark room to light room
opsin and retinal break apart
32
cones
color vision
see sharply
come to point
one axon
need bright light
photoreceptor cells
modified bipolar neuron
33
Cone photopiments
react to light
retinal and opsin
34
iodopsin
blue opsin
35
chlorocruorin
green opsin
36
eryrhrocruorin
red opsin
37
fovea centralis
greatest density of cones
38
macula lutea
no rods, only cones
39
visual fiels
nasal or temporal vision field
40
nasal (central) half
enter eye, focus on temporal retina
41
