Chapter 16: The Sensory System - 25 Tough Terms Flashcards
Uvea components
Iris
Cilliary body
Choroid
Three specially shaped bones in the middle ear that anchor the eardrum to the tympanic cavity and that transmit vibrations to the inner ear
Auditory ossicles
Malleus (hammer)
Incus (anvil)
stapes (stirrup)
Funnel-like structure leading from the external ear to the external auditory meatus
Auricle
Pinna
Thin posterior membrane in the middle layer of the eye
Choroid
Thick anterior membrane in the middle layer of the eye
Ciliary body
Snail shaped structure in the inner ear that contains the organ of corti
Cochlea
Transparent anterior section of the eyeball that bends light in a process called refraction
Cornea
Fluid inside the membranous labyrinth
Endolymph
Tube that connects the middle ear to pharynx
Eustachian
Depression in the center of the macula lutea; perceives sharpest images
Fovea centralis
One of the three auditory ossicles; the anvil
Incus
Glands that secrete liquid to moisten the eyes and produce tears
Lacrimal glands
Colorless, flexible transparent body behind the iris
Lens
Inner ear structure containing hairlike sensors that move to maintain equilibrium
Macula
Small, yellowish area located in the center of the retina, which has a depression called the fovea centralis
Macula lutea
One of the three auditory ossicles; the hammer
Malleus
One of two tubes that make up the semicircular canals
Membranous labyrinth
Thick layer of nervous tissue in the retina
Neuroretina
Structure on the basilar membrane with hairlike receptors that receive and transmit sound waves
Organ of Corti
One of the two tubes that make up the semicircular canals
Osseus labyrinth
Small calcifications in the inner ear that help to maintain balance
Otoliths
Liquid secreted by the walls of the osseus labyrinth
Perilymph
Thick, tough membrane in the outer eye layer; supports eyeball structure
Sclera
One of the three auditory ossicles; stirrup
Stapes
Bony chamber between the semicircular canal and the cochlea
Vestibule
Pupil combining form
cor(o)
core(o)
Pupill(o)
Cornea combining form
Abnormal protrusion of the cornea
corne(o)
kerat(o)
keratoconus
Ciliary body combining form
cycl(o)
Tears combining form
Dacry(o)
Lacrim(o)
Iris
Prolapse of iris
Ir(o), Irid(o)
Iridoptosis
Eardrum, middle ear combining form
Myring(o)
Tympan(o)
Eye combining form
Ocul(o)
Ophthalm(o)
Opt(o)
Optic(o)
Ossicle combining form
Ossicul(o)
Lens combining form
Phac(o), phak(o)
White of the eye combining form
Scler(o)
Darkness combining form
Scot(o)
Unit of refracting power of a lens
Diopter
Inflammation of the middle ear caused by air pressure changes, as in air travel
Aerotitis media
Loss of hearing
Anacusis
Absence of a lens
Aphakia
Distortion of sight because of lack of focus of light rays at one point on the retina
Astigmatism
Loss of elasticity of the eyelid
Blepharochlasis
Dermatochlasis
-chlasis = slackening
Nodular inflammation that usually forms on the eyelid
Chalazion
Fatty cyst within middle ear
Cholesteatoma
Double vision
Diplopia
Excessive tearing
Epiphora
Deviation of one eye inward
Esotropia
Abnormal protrusion of eyelids
Exophthalmos
Exophthalmus
Deviation of one eye outward
Exotropia
Eyestrain
Weakness of the ocular or ciliary muscles that causes the eyes to tire easily
Asthenopia
Farsightedness; focusing behind the retina causing vision distortion
Hyperopia
Any of various diseases caused by abnormally high eye pressure
Glaucoma
Infection of a sebaceous gland of the eyelid;sty
Hordeolum
Secretion of tears
Lacrimation
Gradual loss of vision caused by degeneration of tissue in the macula
Macular degeneration
Elevated pressure within the cochlea
Meniere’s disease
Nearsightedness: Focusing in front of the retina causing vision distortion
Myopia
Night blindness
Nyctalopia
Excessive involuntary eyeball movement
Nystagmus
Fungal infection of the external ear canal
Otitis Externa
Inflammation of the middle ear
Otitis Media
Impaired hearing
Paracusis
Age related hearing loss
Presbyacusis
Age-related diminished ability to focus or accomodate
Presbyopia
Eye with an implanted lens after cataract surgery
Pseudophakia
Progressive, inherited disease with a pigmented spot on the retina and poor night vision
Retinitis pigmentosa
Blind spot in vision
Scotoma
Eye misalignment
Strabismus
Abnormal growth of eyelashes in a direction that causes them to rub on the eye
Trichiasis
Removal of eyeball
Enucleation
Use of ultrasound to break up and remove cataracts
Phacoemulsification
Class of medication that causes contraction of pupil
Miiotic
Class of medication that causes dilation of pupil
Mydriatic
Instrument for determining eye refraction
Optomoter
Pain in the tear sac
Dacryocystalgia