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LOM Ch 17 Sense organs Set 1
Language of Medicine, 9th Edition, Davi-Ellen Chabner Sense Organs
30
Medical
Professional
07/04/2010

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Term
olfactory
Definition
centers of smell in the nose
Term
h
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

Term
pupil
Definition
dark opening of the eye in which light rays enter
Term
iris
Definition
colored portion of the eye that surrounds the pupil
Term
cornea
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
Term
sclera
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
Term
avascular
Definition
has no blood vessels
Term
choroid
Definition
dark brown membrane inside the sclera that contains many blood vessels that supply nutrients to the eye
Term
uvea
Definition
What the choroid, iris, and ciliary body are known as
Term
receptor, nerve, brain
Definition
A stimulus is applied to _______ cells in sense organs, which excite _______ fibers, which carry impulses to the _________, where nerve impulses are translated
Term
lens
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
Term
refraction
Definition
bending of rays as they pass through the cornea, lens, and other tissue
Term
distant, close
Definition
Muscles of the ciliary body flatten the lens for ________ vison, and thicken and round it for ______ vision
Term
accommodation
Definition
refractory adjustment for vision at different distances
Term
aqueous humor
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
Term

false

 

The ciliary body constantly produces aqueous humor

Definition
T or F: The aqueous humor is produced in utero and can never be replaced
Term
vitreous chamber
Definition
large region behind the lens
Term
ciliary body
Definition
Mkes refractory adjustment with the lens and produces aqueous humor
Term
anterior chamber
Definition
cavity that contains aqueous humor
Term
vitreous humor
Definition
soft, jelly-like material that maintains the shape of the eyeball
Term
True
Definition
 T or F: The vitreous humor is not constantly reformed
Term
retina
Definition
thin, delicate, and sensitive nerve layer of the eye, which contains rods and cones
Term
cones
Definition
6.5 million of these function in bright levels of light and are responsible for color and central vision
Term
rods
Definition
120 million of these function at reduced levels of light and are responsible for peripheral vision
Term
red, green, blue
Definition
What are the three types of cones
Term
red, green
Definition
Which two types of cones are affected in color blindness?
Term
optic nerve
Definition
carries nerve impulses from the rods and cones to the brain
Term
optic disc
Definition
region in the eye where the optic nerve meets the retina
Term
optic disc
Definition
known as the blind spot of the eye because it has no light receptor cells
Term
macula
Definition
small, oval, yellowish area adjacent to the optic disc, which contains the fovea centralis
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