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Med Term Notes for Exam 2

by: Katelyn Stolt

Med Term Notes for Exam 2 19316 - AHS 100 - 02

Katelyn Stolt

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About this Document

Study Guide For Exam 2
Medical Terminology
Elizabeth J Aschwege
Study Guide
Medical terminology
50 ?




Popular in Medical Terminology

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This 6 page Study Guide was uploaded by Katelyn Stolt on Tuesday February 23, 2016. The Study Guide belongs to 19316 - AHS 100 - 02 at Grand Valley State University taught by Elizabeth J Aschwege in Fall 2015. Since its upload, it has received 19 views. For similar materials see Medical Terminology in Nutrition and Food Sciences at Grand Valley State University.


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Date Created: 02/23/16
Accommodation: normal adjustment of the eye to focus on objects from far to near Anterior Chamber: the area behind the cornea and in front of the lens and iris Aqueous humor: fluid produced by the ciliary body and found in anterior chamber Biconvex: consisting of two surfaces that are rounded, elevated, and curved evenly; lens of the eye Choroid: middle, vascular layer of the eye, between the retina and the sclera Ciliary body: structure surrounding the lens that connects the choroid and iris; controls shape of lens and secretes aqueous humor Cone: photoreceptor cell in the retina that transforms light energy into a nerve impulse; responsible for color and central vision Conjunctiva: delicate membrane that lines the undersurface of eyelids and covers anterior eyeball Cornea: fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball Fovea centralis: tiny depression in the retina that is the region of clearest vision Fundus of the eye: posterior, inner part of the eye Iris: pigmented layer that opens and closes to allow more or less light into the eye Lens: transparent, biconvex body behind the pupil of the eye Macula: yellowish region on the retinal lateral to and slightly below the optic disc Optic chiasm: the point at which optic nerve fibers cross in the brain Optic disc: the region at the back of the eye where the optic nerve meets the retina, blind spot Optic nerve: cranial nerve carrying impulses from the retina to the brain Pupil: central opening of the eye, surrounded by the iris, through which light rays pass Refraction: bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina Retina: light sensitive nerve cell layer of the eye containing photoreceptor cells Rod: photoreceptor cell of the retina essential for vision in dim light and for peripheral vision Sclera: tough white outer coat of the eyeball Thalamus: relay center of the brain Vitreous humor: soft, jelly like material behind the lens in the vitreous chamber Astigmatism: defective curvature of the cornea or lens of the eye Hyperopia: farsightedness Myopia: nearsightedness Presbyopia: impairment of vision due to old age reducing lens accommodation Cataract: clouding of the lens Chalazion: a small, hard, cystic mass on the eyelid; formed as a result of chronic inflammation of sebaceous gland along margin of eyelid Diabetic retinopathy: retinal effects caused by diabetes mellitus include micro aneurysms, hemorrhages, dilation of retinal veins, neovascularization Glaucoma: increased intraocular pressure damages the retia and optic nerve Hordeolum: staph infection of a sebaceous gland in the eyelid Macular degeneration: progressive damage to the macular of the retina Nystamus: repetitive rhythmic movements of one or both eyes Strabismus: abnormal deviation of the eye Retinal detachment: two layers of the retinal separate from each other Fluorescein angiography: dye injection to examine blood flow in the retina Ophthalmoscopy: visual examination of the interior of the eye through dilated pupil Slit lamp microscopy: magnified view of expanded number of eye structures visual acuity test: assesses clarity of vision Visual field test: measures visual fields when exes are fixed forward Enucleation: removal of the entire eyeball Laser photocoagulation: an argon laser creates an inflammatory reaction that seals retinal tears and leaky blood vessels LASIK: laser to correct errors of refraction by sculpting the cornea Keratoplasty: surgical repair of the cornea Scleral buckle: suture of a silicone band to the sclera over the detached portion of the retina Phacoemulsification: ultrasound to break up lens for aspiration for cataract removal Vitrectomy: removal of vitreous and replacement with a clear solution The Outer ear receives sound waves Sound waves travel to the middle ear Sound vibrations reach the inner ear Auditory canal: channel that leads from the pinna to the eardrum Auditory meatus: auditory canal Auditory nerve fibers: carry impulses from the inner ear to the brain Auditory tube: channel between the middle ear and nasopharynx, Eustachian tube Auricle: flap of the ear; protruding part of the external ear, or pinna Cerumen: waxy substance secreted by the external ear, earwax Cochlea: snail shaped, spirally wound tube in the inner ear Endolypmph: fluid within the labyrinth of the inner ear Incus: second ossicle of the middle ear Labyrinth: maze like series of canals of the inner earl Malleus: first ossicle of the middle ear Organ of Corti: sensitive auditory receptor area found in the cochlea of the inner ear Ossicle: small bone of the ear Oval window: membrane between the middle ear and in the inner ear Perilymph: fluid contained in the labyrinth of the inner ear Pinna: auricle; flap of the ear Semicircular canals: passages in the inner ear associated with maintain equilibrium Stapes: third ossicle of the middle ear Tympanic membrane: membrane between the outer and middle ear, eardrum Vestibule: central cavity of the labyrinth, connecting the semicircular canals and cochlea th Acoustic neuroma: benign tumor arising from 8 cranial nerve, cases tinnitus, vertigo, dizziness, and decreased hearing Cholesteatoma: skin cells and cholesterol in a sac in the middle ear Deafness: loss of ability to hear Meniere disease: disorder of the labyrinth with elevated endolymph pressure in the cochlea and semicircular canals causing tinnitus, sensitivity to sound, progressive hearing loss, headache, nausea, and vertigo Otitis media: inflammation of the middle ear Otosclerosis: hardening of bony tissue in the labyrinth Tinnitus: sensation of noises in the ear Vertigo: sensation of the irregular motion from disease of the inner ear or nerve carrying messages from the semicircular canals Audiometry: an audiometer is and electric device used to determine hearing loss by frequency Cochlear implant: a surgically implanted devices that allows sensorinueral hearing impaired persons to understand speech Ear thermometry: body temperature measure with fared radiation from the eardrum Otoscopy: visual examination of the ear with a small, hand held scope Tuning fork test: hearing tests using a vibrating fork


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