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28 terms

The Special Senses

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rod cells and cone cells are examples of
photoreceptors
olfactory cells and gustatory cells are examples of
chemoreceptors
the ___ is the white, outer protective covering of the eye that functions to help maintain eye shape
sclera
the ___ is the pigmented muscle that controls the amount of light that passes into the lens
iris
the ___ is the opening in the iris through which incoming light enters the eye
puple
rod cells are receptor neurons on the retina that are primarily concerned with
twilight vision
cone cells are receptor neurons on the retina that are primarily concerned with
daylight and color vision
the eye's anterior cavity is filled with
watery aqueous humor
the eye's posterior cavity is filled with
jelly-like vitreous humor
the transparent, protective outer covering on the anterior part of the eye is the
cornea
the inner (photosensitive) layer of the wall of the eye is made up of the
retina
permit more light to enter the eye
dilator muscles
restrict the amount of light that enters the eye
sphincter
proper focusing requires that _______ contract and relax to change the shape of the flexible lens
ciliary muscles
condition: eye movement is not synchronized. Cause: lack of coordination or strength of the muscles that control eye movement
strabismus
is characterized by damage to the optic nerve, typically from high intra-ocular pressure
glaucoma
is characterized by generally blurry vision due to an irregular curvature of the lens or cornea
astigmatism
is the condition where an image forms behind the retina because the eyeball is too short (farsighted)
hyperopia
is the condition where an image forms in front of the retina because the eyeball is too long (nearsightedness)
myopia
functions to capture sound waves and funnel them to the tympanic membrane
pinna
the technical term for eardrum
tympanic membrane
ossicles
malleus, incus, and stapes
snail-shaped structure of the inner ear that houses specialized receptor cells capable of changing vibrations into nerve impulses
cochlea
leads from the middle ear to the pharynx (throat) and functions to drain fluid and equalize pressure on either side of the eardrum
eustacion tube
sense of taste is technically referred to as the
gustatory sense
the technical name for taste buds are
gustatory cells
the sense of smell is technically referred to as the
olfactory sense
the structures within the inner ear that are associated with equilibrium are collectively called the
vestibular apparatus