Term
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Definition
centers of smell in the nose |
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Term
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Definition
Which are sense organs?
a) eye
b) ear
c) skin
d) taste buds
e) olfactory
f) receptors
g) all of the above
h) all but f
i) a-d |
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Term
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Definition
dark opening of the eye in which light rays enter |
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Term
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Definition
colored portion of the eye that surrounds the pupil |
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Term
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Definition
fibrous, transparent tisue that extends over the pupil and iris--it refracts rays of light so they are focused onto the receptors in the posterior region of the eye |
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Term
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Definition
opaque white of the eye, a fibrous layer under the the conjunctiva that extends from the cornea to the optic nerve--its blood vessels nourish the cornea |
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Term
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Definition
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Definition
dark brown membrane inside the sclera that contains many blood vessels that supply nutrients to the eye |
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Term
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Definition
What the choroid, iris, and ciliary body are known as |
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Term
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Definition
A stimulus is applied to _______ cells in sense organs, which excite _______ fibers, which carry impulses to the _________, where nerve impulses are translated |
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Term
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Definition
The ciliary body surrounds the outside of the ________, which it is connected to--allowing it to adjusst the shape and thickness of rays of light |
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Term
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Definition
bending of rays as they pass through the cornea, lens, and other tissue |
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Term
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Definition
Muscles of the ciliary body flatten the lens for ________ vison, and thicken and round it for ______ vision |
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Term
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Definition
refractory adjustment for vision at different distances |
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Term
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Definition
a fluid secreted by the ciliary body that is found in the anterior chamber of the eye, which maintains the shape and nourishes structures in that region |
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Term
false
The ciliary body constantly produces aqueous humor |
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Definition
T or F: The aqueous humor is produced in utero and can never be replaced |
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Term
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Definition
large region behind the lens |
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Term
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Definition
Mkes refractory adjustment with the lens and produces aqueous humor |
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Term
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Definition
cavity that contains aqueous humor |
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Term
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Definition
soft, jelly-like material that maintains the shape of the eyeball |
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Term
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Definition
T or F: The vitreous humor is not constantly reformed |
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Term
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Definition
thin, delicate, and sensitive nerve layer of the eye, which contains rods and cones |
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Term
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Definition
6.5 million of these function in bright levels of light and are responsible for color and central vision |
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Term
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Definition
120 million of these function at reduced levels of light and are responsible for peripheral vision |
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Term
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Definition
What are the three types of cones |
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Term
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Definition
Which two types of cones are affected in color blindness? |
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Term
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Definition
carries nerve impulses from the rods and cones to the brain |
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Term
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Definition
region in the eye where the optic nerve meets the retina |
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Term
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Definition
known as the blind spot of the eye because it has no light receptor cells |
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Term
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Definition
small, oval, yellowish area adjacent to the optic disc, which contains the fovea centralis |
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