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histology > eye > Flashcards

eye Flashcards

(55 cards)

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1
Q

sensory receptord

A

interface between the nervous system and the internal and external environemnt

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2
Q

general senses

A

temperature, pain touch, proprioception

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3
Q

special senses

A

small, taste, balance, hearing, vision

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4
Q

simplest receptors

A

free nerve ending

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5
Q

retina receptors

A

specific and only respond to light

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6
Q

receptive fields

A

receptors far apart and hard to localize stimulus

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7
Q

exteroceptors

A

information about the external environment

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8
Q

proprioceptors

A

inormation about body position

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9
Q

interoceptors

A

inforation about the inside of the body

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10
Q

eye accessory structures

A

-Palpebrae (eyelids)
-canthus (eyelid at corner)
-palbrae fissure (btwn eyelid)
-lashes
-conjunctiva (epithelial linning eye)
-glands

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11
Q

what triggers blink

A

root hair plexus

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12
Q

conjunctiva

A

inside linning eyelid
-produces fluid to keep wet
-ocular conjunctiva= outer
-palbral= inner

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13
Q

glands

A

protection or lube

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14
Q

glands of zeis

A

-sebacesous
-eyelashes

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15
Q

tarsals

A

-keep eyelid from sticking together w lipid rich product
-inner amrgin of eye

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16
Q

lacrimal gland

A

make tears

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17
Q

lacrimal carnumcle

A

-thick secretions
-canthus area

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18
Q

cyst

A

from infection of tarsals gland

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19
Q

sty

A

infection of any other gland

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20
Q

lacriminal apparatus

A

-lacrimal gland
-canaliculi
-sac
-nasolacriminal duct

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21
Q

tear flow

A

-made in lacrimal gland to the ocular surface then the nasolacrimal canal (foramen), enters nasal cavity (runny nose tears)

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22
Q

eye tunics

A

fibrous tunic, vascular tunic and neural tunic

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23
Q

posterioir cavity

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A

vitreous fluid

24
Q

posterioir chamber

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A

aqeuous fluid

25
blind spot
optic disk -there is no retina there
26
eye layers
retina to choiroid to sclera
27
fovea
only cones
28
vascular tunics (MIDDLE)
choiroid and ciliar body and iris -blood vessels, intrinsic and lymphatics -regulate light entering eye -secrete aqueous fluid -accomodation -pigment of eye
29
fibrous tunic (OUTER LAYER)
cornea and sclera -attach extraocular muscles
30
nueral tunic
neural part (inner) and pigmented part (outer) RETINA
31
accomodation caused by
cilliary body contraction -changes focal length to focus on diff diatances -18 dioptres
32
anterioir cavity
made of anterioir ad posteiroir chamber -aqueous
33
aqueous fluid enters through?
posterioir chamber and flows trough pupil area and enters through anterioir chamber through canal of schlemm and enters venous circulation
34
canal of schlemm
maintain homeostasis by drainging aqueous fluid to systemic n.s.
35
build up of fluid in schlemm
glaucoma
36
detached retina
aquious fluid is not putting enough pressure against the retina
37
vitrious fluid
support eye shape, lens, retina
38
limbis stem cells
keep cornea functioning
39
layers of the cornea
stratified squamous, stroma and posterioir epithelium
40
lens
epithelium and laminated fibers -has germinal zone, capsule, fibers -no organelles bc would block light -refracts light -10mm diameter
41
lens fibers
secondary anucleated -terminal differentiation
42
best color vision
fovea centralis
43
optic nerve
cranial nerve 2
44
do all fibers cross at the chiasm
no
45
what regulates light enetering eye globe
iris whihc is in front of the eye
46
what hold the lens
suspensory ligaments
47
does the lense grow through life
yes
48
lens parts
capsule, epithelium and fibers (fibers on anterioir)
49
does the lense have nerves, bv or c.t
no
50
crystaline lense capsuel
basement membrane completely surroinding it -made of collagen 4 whihc is made by the epithelium
51
lense epithelium
maintain homeostasis of pressure and everything -nak pump and ions -progineter for new lens fibers
52
lens fiber
4-7 micro diameter and 12mm long -honecomb -new fibers get added to the outer cortex -no organelles or nuc (denucleate)
53
thickest base membrane in the body?
lens capsul
54
lens if
64 water and 35 protein
55
get nutrient
diffusion

histology (20 decks)

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