front 1 what percentage of sensory receptors in the body are in the eye | back 1 70 |
front 2 the diameter of the eye is | back 2 1 inch |
front 3 what fraction of the eye is visible | back 3 1/6 |
front 4 parts of the eye | back 4 eyeball and accessory structures |
front 5 what are the accessory structures of the eye | back 5 eyebrows, eyelids, conjunctiva, lacrimal apparatus, extrinsic muscles of the eye |
front 6 terminal hair that overlie the supraorbital margins of the skull | back 6 eye brows |
front 7 function of eye brows | back 7 help to shad the eyes from sunlight and prevent perspiration trickling down the forehead from reaching the eyes |
front 8 the eyelids are think, skin covered folds supported internally by connective tissue sheets called | back 8 tarsal plates |
front 9 the space between the two eye lids is called the | back 9 palperbral fissure |
front 10 the eyelids meet at the | back 10 medial and lateral commissures |
front 11 on the medial commissure, a fleshy elevation that contains sebaceous and sweat glands that produce a whitish oily secretion | back 11 lacrimal caruncle |
front 12 the tarsal plates are anchored by | back 12 orbicularis oculi and levator palpebrae superioris |
front 13 modified sebaceous glands that produce an oily substance which lubricates the eyelid and the eye form sticking together | back 13 tarsal galnds |
front 14 transparent mucous membrane that lines the inner aspect of the eyelids | back 14 conjunctiva |
front 15 the membrane that lines the inner aspect of the eyelid (part of the conjunctiva) | back 15 palpebral conjunctiva |
front 16 the membrane that lines the anterior surface of the eyeball (part of the conjunctiva) | back 16 bulbar conjunctiva |
front 17 function of the conjunctiva | back 17 produces a lubrication mucus that prevents the eyes from drying out. |
front 18 lacrimal fluid contains | back 18 mucus, antibodies, and lysozymes (enzymes that destroy bacteria) |
front 19 what are the three layers of the eye ball | back 19 fibrous, vascular and inner |
front 20 which is the outermost layer of the eye | back 20 fibrous layer |
front 21 dense avascular connective tissue | back 21 fibrous layer |
front 22 what are the two parts of the fibrous layer | back 22 sclera and cornea |
front 23 white and opaque, provides a study anchoring site for extrinsic eye muscles | back 23 sclera |
front 24 posterior 5/6 of eye | back 24 sclera |
front 25 anterior 1/6 of eye | back 25 cornea |
front 26 transparent part of eye with nerve endings | back 26 cornea |
front 27 middle layer of the eyeball | back 27 vascular |
front 28 also called the uvea | back 28 vascular layer |
front 29 the three parts of the vascular layer | back 29 choroid, ciliary body and iris |
front 30 forms the posterior 5/6 of the vascular layer | back 30 choroid |
front 31 prevents light from scattering and reflecting within the eye | back 31 choroid |
front 32 incomplete posteriorly where the optic nerve leaves the eye | back 32 choroid |
front 33 thickened ring of tissue that encircles the lens | back 33 ciliary body |
front 34 the ciliary body consists chiefly of interlacing smooth muscle bundles called | back 34 ciliary muscles |
front 35 acts to control lens shape | back 35 ciliary muscles |
front 36 the posterior surface of the lens is thrown into radiating folds called | back 36 cilary processes |
front 37 secrete the fluid that fills the cavity of the anterior segment of the eyeball | back 37 ciliary processes |
front 38 attaches to the ciliary processes to the lens | back 38 ciliary zonule |
front 39 makes of 1/6 of the fibrous layer | back 39 iris |
front 40 visible part of the eye | back 40 iris |
front 41 most anterior portion of the vascular layer | back 41 iris |
front 42 round central opening that allows light to enter the eye | back 42 pupil |
front 43 the two smooth muscle layers that make the iris | back 43 sphincter pupillae (circular) and the dilator pupillae (radial) |
front 44 contains melonocytes | back 44 choroid |
front 45 innermost layer of the eyeball | back 45 retina |
front 46 contains millions of photoreceptors that transduce light energy | back 46 retina |
front 47 two layers of the retina | back 47 outer pigmented layer and a neural layer |
front 48 absorb light and prevent it from scattering in the eye and also act as phagocytes participating in photoreceptor cell renewal and store vitamin A | back 48 pigmented layer of retina |
front 49 the neural layer of the retina is composed of | back 49 photoreceptors, bipolar cells, and ganglion cells |
front 50 where the optic nerve exist the eye | back 50 optic disc |
front 51 posterior wall of the eye | back 51 fundus |
front 52 another name for the optic disc | back 52 blind spot |
front 53 what does a blind spot exists | back 53 because it doesn't contain photoreceptors |
front 54 the quarter billon photoreceptors found in the neural layer are of two types- | back 54 rods and cones |
front 55 dim light and peripheral vision receptors | back 55 rods |
front 56 sensitive to light, but they do not provide sharp images or color vision | back 56 rods |
front 57 receptors for bright light and provide high resolution color vision | back 57 cones |
front 58 lateral to the blind spot of each eye, and located precisely at the eyes posterior pole is an oval region called | back 58 macula lutea |
front 59 minute pit in the center of the mascula lutea | back 59 fovea centralis |
front 60 only cones in this area | back 60 fovea centralis |
front 61 posterior segment of the eye is felled with a clear gel called | back 61 vitreous humor |
front 62 anterior segment is filled of the eye is filled with | back 62 aqueous humor |
front 63 clear fluid similar in composition to blood plasma, found in the eye | back 63 aqueous humor |
front 64 biconvex, transparent, flexible and avascular | back 64 lens |
front 65 focal point is in front of the retina | back 65 myopic (nearsighted) |
front 66 focal point is behind retina | back 66 hyperopic (farsighted) |
front 67 contains perilymph | back 67 scala vestibule and scala tympani |
front 68 contains endolymph | back 68 scala media |
front 69 pinna auricle | back 69 the external ear |
front 70 another for the rim of the ear | back 70 helix |
front 71 which part of the ear contains cartilage | back 71 external ear |
front 72 which part of the external ear does not contain cartilage | back 72 lobule |
front 73 extends from the auricle to the ear drug | back 73 external auditory meatus |
front 74 canal lined with skin bearing hairs | back 74 external auditory meatus |
front 75 contains sebaceous glands and ceremonious glands which produce ear wax | back 75 external auditory meatus |
front 76 ear drum | back 76 tympanic membrane |
front 77 thin connective tissue membrane of external ear | back 77 tympanic membrane |
front 78 lined by skin on the external surface and mucus on the internal surface | back 78 tympanic membrane |
front 79 like a flattened cone with the apex located internally | back 79 tympanic membrane |
front 80 extends from the ear drum laterally to the round and oval window internally to the round and oval window internally | back 80 middle ear |
front 81 extends form the middle ear to the nasopharynx. helps to equalize pressure in the middle ear cavity with external air pressure | back 81 pharyngotympanic tube |
front 82 the three bones that make up the inner ear | back 82 malleus, incus, stapes |
front 83 lateral bone on the middle ear | back 83 malleus |
front 84 middle bone of the middle ear | back 84 incus |
front 85 medial bone of the middle ear | back 85 stapes |
front 86 where do the bones of the middle ear rest | back 86 oval window |
front 87 two tiny skeletal muscles that contract reflexively in response to loud sound in order to minimize damage to the hearing receptor | back 87 tensor tympani and stapedius |
front 88 the internal ear is also called the | back 88 labyrinth |
front 89 filled with perilymph | back 89 bony labyrinth |
front 90 three regions of the bony labyrinth | back 90 vestibule, semicircular canal, cochlea |
front 91 lies within the perilympth of the bony labyrinth and filled with endolymph | back 91 membranous labyrinth |
front 92 the regions of the membranous labyrinth | back 92 saccule and utricle |
front 93 the saccule and utricle houses equilibrium receptor regions called that respond to gravity | back 93 maculae |
front 94 canals that are perpendicular to each other | back 94 semicircular canals |
front 95 each duct of the semicircular canal has a enlarged swelling at one end called | back 95 ampulla |
front 96 ampulla's house an equilibrium receptor region called that respond to rotation of the head | back 96 crista ampullaris |
front 97 twisted about 2 1/2 times | back 97 cochlea |
front 98 cochlea contains the organ of hearing called | back 98 oragn of corti |
front 99 # of waves within a given time period | back 99 frequency |
front 100 higher frequency = | back 100 higher pitch |
front 101 degree of loudness | back 101 amplitude |
front 102 higher amplitude = | back 102 louder sound |