structure and function

Question 1

It transmits visual stimuli to the brain for interpretation and function as the organ of vision.

Answer 1

eye

Question 2

located in the eye orbit, a round, bony hollow formed by several different bones of the skull.

Answer 2

eyeball

Question 3

in the ____ a cushion of fats surrounds the eye.

Answer 3

orbit

Question 4

these protects the eyeball

Answer 4

bony orbit and fat cushion

Question 5

are two movable structures composed by skin

Answer 5

eyelids

Question 6

what are the two types of eyelids.

Answer 6

striated and smooth

Question 7

their purpose is to protect the EU from foreign bodies and limit the amount of light following the eye

Answer 7

striated and smooth eyelids

Question 8

the upper eyelid is larger, more mobile and contains ___ made up of connective tissue

Answer 8

tarsal plates

Question 9

tarsal plates contain the ___ which secrete and oily substance that lubricate the eyelid

Answer 9

meibomian glands

Question 10

they serve to distribute tears that lubricate the surface of the eye.

Answer 10

striated and smooth eyelids

Question 11

the eyelids joined at two points, what are these?

Answer 11

lateral(outer) canthus and medial(inner) canthus

Question 12

the medial canthus contains the ___ two small openings that allows drainage of tears into the lacrimal system

Answer 12

puncta

Question 13

a small fleshy mass that contains sebaceous gland

Answer 13

caruncle

Question 14

the white space between the open eyelid is called what?

Answer 14

palpebral fissure

Question 15

the point where the sclera meets the cornea

Answer 15

corneal limbus

Question 16

are projections of stiff hair curving outward along the margins of the eyelids that filter dust and dirt from air entering the eye.

Answer 16

eyelashes

Question 17

is a thin transparent, cutaneous membrane.

Answer 17

conjunctiva

Question 18

what are the two portions of conjunctiva?

Answer 18

palpebral and bulbar portion

Question 19

it lines the inside of the eyelid.

Answer 19

palpebral conjunctiva

Question 20

cover most of the anterior eye, merging with the cornea at the limbus.

Answer 20

bulbar conjunctiva

Question 21

consist of glands and ducts that lubricate the eye

Answer 21

lacrimal apparatus

Question 22

located in the upper outer corner of the orbital cavity just above the eye, produces tears.

Answer 22

lacrimal gland

Question 23

as the lid blinks, tears wash across the eye then drain into the ___ which are visible on the upper and lower limbs at the inner canthus.

Answer 23

puncta

Question 24

tears empty into the ____ snd are then channeled into the ___ through the ____

Answer 24

lacrimal canals, nasolacrimal sac, nasolacrimal duct

Question 25

tears drain into the ____

Answer 25

nasal meatus

Question 26

the ____ are the six muscles attached to the outer surface of the eyeball

Answer 26

extraocular muscle

Question 27

what are the four rectus muscles?

Answer 27

superior, inferior, lateral and medial

Question 28

what are the two oblique muscles that are responsible for moving the eye in the direction controlled by that muscle

Answer 28

superior and inferior

Question 29

these muscles allow for parallel movements of the eyes and thus the binocular vision characteristics of humans.

Answer 29

extraocular muscle

Question 30

these muscles are supplied by three cranial nerve

Answer 30

oculomotor, trochlear and abducens

Question 31

it is composed of three separate costs or layers

Answer 31

eyeball

Question 32

what are the external layers of the eye?

Answer 32

sclera and cornea

Question 33

is a dense, protective, white covering that physically supports the internal structures of the eye.

Answer 33

sclera

Question 34

it permits the entrance of the light, which passes through the lens to the retina

Answer 34

cornea

Question 35

it is continuous anteriorly with transparent cornea( the window of the eye)

Answer 35

sclera

Question 36

it is well supplied with nerve endings, making it responsive to pain and touch

Answer 36

cornea

Question 37

because of this sensory property, contact with a wisp of cotton stimulates a blink in both eyes known as the ____

Answer 37

corneal reflex

Question 38

the middle layer, consist both an anterior portion, which includes the _____ and ____. and a posterior layer which includes the ____

Answer 38

iris and the ciliary body. choroid

Question 39

consist of muscle tissue that controls the thickness of the lens, which must be adopted to focus on objects near and far away.

Answer 39

cilliary body

Question 40

circular disc of muscle containing pigments that determines eye color

Answer 40

iris

Question 41

it is the central aperture of the iris.

Answer 41

pupil

Question 42

a biconvex, transparent, avascular, encapsulated, structure located immediately posterior to the iris.

Answer 42

lens

Question 43

attached to the cilliary body supports the position of the lens

Answer 43

suspensory ligaments