The Eye

Question 1

Optic Sulci

Answer 1

Out-pocketing of the diencephalon towards the surface ectoderm.

Question 2

Germ layer of the Mesoderm form

Answer 2

Muscles of the eye

Question 3

Ectoderm forms

Answer 3

The eyeball

Question 4

Tarsal plate

Answer 4

Maintains the structure of the eyelid

Question 5

Orbicularis Oculi

Answer 5

Closes the upper eyelid

Question 6

Levator palpebrae superioris

Answer 6

Opens the upper eyelid

Question 7

Eyelashes

Answer 7

A part of the palpebrae

Question 8

Aqueous Chamber

Answer 8

2 sections in front of the lens: anterior aqueous humor and posterior aqueous humor

Question 9

Humor that lies behind the lens

Answer 9

Vitreous humor

Question 10

Goblet cell location and function

Answer 10

They are located in the conjunctiva and secrete tears

Question 11

Avascular

Answer 11

Nutrients from aqueous, O2 from air

Question 12

Limbus

Answer 12

Junction of the cornea with the sclera

Question 13

Where is humor produced

Answer 13

The posterior chamber of the cornea

Question 14

Rhodopsin

Answer 14

Opsin and Retinene

Question 15

Canaliculus

Answer 15

Duct system by which tears flow

Question 16

Dorsolateral adnexa

Answer 16

Lacrimal Gland

Question 17

Ventrolateral carnivore adnexa

Answer 17

Zygomatic salivary gland

Question 18

Lacrimal sac and drainage

Answer 18

Where the canaliculus converge and drain into the nasal cavity

Question 19

Bulbar Conjunctiva

Answer 19

Covers the outer surface of the eye

Question 20

Palpebral Conjunctiva

Answer 20

Covers the inner surface of the upper and lower eyelid. Continuous with the bulbar conjunctiva

Question 21

Edinger Westphal

Answer 21

Controls pupillary light via parasympathetic fibers

Question 22

Miosis

Answer 22

Reduction of pupil size

Question 23

Ptosis

Answer 23

Drooping of eyelid

Question 24

Enophthalmia

Answer 24

Sunken eye

Question 25

IOP Reduced

Answer 25

Intraocular pressure is decreased

Question 26

Signs of Horner’s Syndrome

Answer 26

Miosis, ptosis, 3rd eyelid protruding, enophthalmia, conjunctival vascular engorgement, IOP reduced, horses will sweat on the same side

Question 27

Strabismus

Answer 27

Abnormal eye position caused by malfunction of nerves controlling muscles in the eye

Question 28

CN VI strabismus

Answer 28

Abducens is damaged and pupils move medially

Question 29

CN IV strabismus

Answer 29

Controls the rotation of the eye and when damaged, the ventral Obelix will rotate the eye more medially from the ventral side \ /

Question 30

CN III strabismus

Answer 30

Damage will pull the pupils to the ventrolateral position

Question 31

The outer layer of the double optic cup

Answer 31

Thin and expresses melanin granules, becomes the retina

Question 32

The inner layer of double-walled optic cup

Answer 32

Thick and develops into the sensory layer of the retina, the optic nerve

Question 33

What are the 3 parts of the eye

Answer 33

Transparent media, the wall, the extraocular structures

Question 34

Transparent media

Answer 34

Conjunctiva, cornea, aqueous humor, lens, vitreous humor

Question 35

Where does filtration of the humor occur

Answer 35

Episcleral vessels in the canal of schlemm which sits within the iridocorneal angle

Question 36

Conjunctiva cell type

Answer 36

Stratified squamous epithelium

Question 37

Lens cell type

Answer 37

Cuboidal epithelium

Question 38

Components of the wall

Answer 38

Retina, Uveal Tract, and Sclera

Question 39

The reflective portion of the eye that concentrates light in the dark

Answer 39

Tapetum Lucidum of the choroid

Question 40

Parts of the choroid

Answer 40

Tapetum Lucidum in the back, Vascular, black/connective Retina

Question 41

For light dependant breeders, where is hormonal rhythm controlled?

Answer 41

Hypothalamic suprachiasmatic nucleus

Question 42

Nictitating Membrane

Answer 42

Blinking the 3rd eyelid

Question 43

Mydriasis

Answer 43

Increase size of pupil. Dilation