eye - unit 5

Question 1

protects eye from sweat. helps shade eyes. hair follicles above eye.

Answer 1

eyebrow

Question 2

protects the eye from objects, blinking reflex, helps shade eys, contains eyelashes (“eyelids”)

Answer 2

palpabrae

Question 3

infection of the oil gland connected to eyelash

Answer 3

stye

Question 4

membrane infront of eyeball, it folds and lines the eyelid. secretes mucous, protects eyes, contains small blood vessels

Answer 4

conjuctiva

Question 5

“pink eye” inflammation of conjunctiva from infection

Answer 5

conjuctivitis

Question 6

“tear glands” in eye socket above eyeball. secretes tears

Answer 6

lacrimal gland

Question 7

contain h20, mucous, and lysozyme. helps lubricate eye, prevent infection, and displays emotion.

Answer 7

tears

Question 8

drains tears, found beneath skin of nose

Answer 8

lacrimal sacs

Question 9

drains tears from lacrimal sacs into nasal cavity

Answer 9

nasolacrimal duct

Question 10

6 muscles that stabilize/hold/allow movement of eye.

Answer 10

extrinsic eye muscles

Question 11

3 layers of the eyeball

Answer 11

fibrous tissue, vascular tissue, and sensory tunic

Question 12

outer layer of the eyeball

Answer 12

fibrous tunic

Question 13

two parts of the fibrous tissue

Answer 13

sclera and cornea

Question 14

fibrous tissue. in rear portion of eye, white dense irregular CT that contains blood vessels. provides strength and spherical structure, anchors the extrensic eye muscles

Answer 14

sclera

Question 15

fibrous tissue. front shield of eye, transparent. only place in body to not get nutrition from blood and not be effected by the immune system. it bends light to help focus light into retina.

Answer 15

cornea

Question 16

middle layer of the eyeball

Answer 16

vascular tissue

Question 17

4 parts of the vascular tissue

Answer 17

choroid, ciliary body, iris, pupil

Question 18

vascular tissue. rear portion, dark brown (high melanin). onsorbs light that passes through retina (prevents light scattering/reflecting)

Answer 18

choroid

Question 19

vascular tissue. infront of choroid, dark brown ring with smooth muscles that attach to lens via suspensory ligaments. filters blood + forms aqueous humor that flows through front compartment

Answer 19

ciliary body

Question 20

vascular tissue. ring of smooth muscle in front of lens, surrounds pupil, regulates amount of light passing, contains melanocytes and melanin. gives rise to eye color.

Answer 20

iris

Question 21

hole in middle front of eye that allows light in pass through to lens

Answer 21

pupil

Question 22

when iris increases pupil diameter

Answer 22

pupil dialation

Question 23

when iris decreases pupil diameter

Answer 23

pupil constriction

Question 24

deepest layer of the eyeball. contains photoreceptor cells and sensory neurons.

Answer 24

sensory tunic

Question 25

two parts of sensory tunic

Answer 25

optic disc, macula lutea

Question 26

sensory tunic. blind spot. axons of retinas sensory neurons exit eyeball and form optic nerve. no photoreceptor cells. light projected here is invisible.

Answer 26

optic disc

Question 27

sensory tunic. round patch in retina that has increase number of cone photoreceptor cells, light is focused.

Answer 27

macula lutea

Question 28

two types of photoreceptor cells

Answer 28

rods and cones.

Question 29

photoreceptor cell. gives rise to grayscale vision.

Answer 29

rods

Question 30

photoreceptor cell. gives rise to color vision.

Answer 30

cones

Question 31

made of transparent (clea) crystalized cells, behind iris and pupil. attached to cicilary body via suspensory ligaments which alter lens shape via contraction

Answer 31

lens

Question 32

clear water-like fluid formed by filtration of blood

Answer 32

aqueous humor

Question 33

gel-like fluid which holds retina in place

Answer 33

vitreous humor

Question 34

3 eye diseases

Answer 34

cataract, glaucoma, macula degeneration

Question 35

eye disease. clouding of lens.

Answer 35

cataract

Question 36

eye disease. damige to optic nerve/sensory nuerons of retina

Answer 36

glaucoma

Question 37

eye disease. photoreceptors in macula lutea die.

Answer 37

macula degeneration

Question 38

to view a ____ object, your iris contracts and pupil constricts. lens buldge to inc bending of light.

Answer 38

close

Question 39

to view a ____ object, your iris contracts and pupil dialate. lens flatten to dec bending of light.

Answer 39

far

Question 40

3 types of vision conditions

Answer 40

nearsightedness, farsightedness, astigmatism

Question 41

vision condition. person cannot see far away. long oblong eye so lens cant flatten enough.

Answer 41

nearsightedness

Question 42

vision condition. person cannot see up close. wide oblong eye so lens cant buldge.

Answer 42

farsightedness

Question 43

vision condition. irregular curvature of eye's cornea

Answer 43

astigmatism

Question 44

near point of vision is

Answer 44

how close you can focus on an object. inc with age.

Question 45

genetic condition in which you lack a photoreceptor cone type

Answer 45

colorblindness

Question 46

down-regulation of photoreceptors

Answer 46

photobleaching