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A&P I: Sensory systm

Eyes & Ears Ch.17&18

QuestionAnswer
A structure that changes a stimulus into an electrical signal sensory neuron
With which part of a neuron are sensory receptors most commonly associated? dendrites
How are stimuli of greater intensity encoded? greater frequency of action potentials
anterior clear portion of fibrous tunic cornea
retinal area providing keenest vision fovea centralis
attaches lens to ciliary body suspensory ligament
biconvex structure that focuses light lens
posterior portion of fibrous tunic sclera
mucous membrane covering sclera, lining eyelids conjunctiva
"white" of the eye sclera
choroid, ciliary body, and iris vascular tunic
regulates the amount of light entering the eye iris
controls shape of lens for focusing ciliary body
tough outer layer, protects, gives shape to eye sclera
colored part of eye iris
rods & cones are located here retina
also known as the "blind spot" optic disk
opening in iris allowing light into the eye pupil
structures of outer ear auricle & external acoustic meatus
structures of the middle ear malleus, stapes, incus, tympanic membrane, auditory (eustachian) tube
structures of inner ear oval window, inner ear, cochlea, semi-circular canals, vestibule, round window
eardrum tympanic membrane
leads sound waves to the eardrum external acoustic meatus
equalizes pressure within middle ear auditory (eustachian) tube
ossicle in contract with eardrum malleus
ossicle in contact with oval window stapes
3 auditory ossicles malleus, incus, stapes
location of sound receptors cochlea
location of equilibrium receptors vestibule, semicircular canals
conducts sound waves into inner ear auricle
pressure damper for inner ear round window
Created by: MKC
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