Multiple Choice Flashcards
The congenital condition of “crossed eyes” is also known as:
strabismus
The aqueous humor of the eye is reabsorbed into the venous blood through the:
scleral venous sinus (canal of Schlemm)
Which cranial nerve is responsible for moving the eye laterally?
Cranial nerve (abducens)
The fading of a smell some time after you enter a room is an example of experiencing:
Sensory adaption
The inability to see distant objects is termed “nearsighted” or:
myopia
Which of the following extrinsic eye muscles is responsible for rotating the eye laterally?
Lateral rectus
Treatment of a cataract usually involves removal of the:
Lens
Taste receptors are:
Modified epithelial cells
Visual pigments are derivatives of
rhodopsin
The daily day/night cycle known as a circadian rhythm is established in the
hypothalamus
The shape of the lens is controlled by the:
Suspensory ligaments
The greatest visual acuity is found at the:
fovea centralis
Taste buds are monitored by cranial nerves:
VII, IX, X
When viewing an object close to you, your lens should be more:
convex
What structure of the eye focuses light on the retina:
lens
The middle coat of the eyeball that contains pigment which prevents light from scattering in the eyeball is the:
retina
The three sets of color receptors within the retina are sensitive to wavelengths of visible light that are:
blue, green, red
There are _____ primary taste sensations.
4
The fibrous outermost tunic seen anteriorly as the “white of the eye” is the:
sclera
Night blindness can be treated by administering
vitamin A
The pigmented portion of the eye is the
iris
The space between the suspensory ligaments and the iris are
posterior chamber
Visual acuity is also known as
clarity of vision
Rhodopsin is found in
rods
Nearsightedness is more properly called
myopia
The lens of the eye thickens when the
ciliary muscles relax
The oily secretions that lubricate the eye are produced by the
tarsal glands
Normal eye focusing is termed
emmetropia
Loss of lens transparency is referred to as
cataract
Tarsal glands associated with the edges of the eyelids are considered modified
sebaceous glands
Which layer of the eye contains rods and cones?
retina
Which of the following concerning olfaction is false?
Olfactory receptors are highly modified neurons
The gel-like substance that reinforces the eyeball and prevents is from collapsing inward is the:
vitreous humor
Olfactory glands
produce a pigments mucus that covers the olfactory epithelium
The vitreous body
helps to stabilize the eye and give physical support to the retina
The only special sense that is NOT fully functional at birth is:
vision
The lacrimal glands
a and b only
The color receptors within the retina are sensitive to lights that are
red, blue, green
The function of gustatory receptors parallels that of
olfactory receptors in the nose
The pigmented portion of the eye that has a rounded opening through which light passes is the:
iris
A sudden flash of bright light would
cause contraction of the pupillary constrictor muscles
Eyes suddenly exposed to bright light experience
pupillary reflex
The decreased lens elasticity associated with aging that makes it difficult to focus on near objects is known as:
presbyopia
Which of the following correctly lists the order of the parts through which light passes as it enters the eye:
Cornea, aqueous humor, lens, vitreous humor
As nerve fibers from the retina travel to the brain, axons from the
retinas of both eyes ALL cross over
The anterior cavity is
filled with aqueous humor
Chemoreceptors are located in the
carotid and aortic bodies
The transparent central anterior portion of the sclera through which light enters the eye is called the:
cornea
The gland that produces tears in the eye is called the:
lacrimal gland
Which of the following extrinsic eye muscles is responsible for enabling the eye to look upward?
superior rectus
The transparent portion of the eye is the
cornea
A blind spot in the retina occurs where
the optic nerve attaches to the retina
Which of the following is a primary taste sensation?
sweet
The highly contagious bacterial infection known as “pink eye” is caused by bacterial or viral irritation of the:
conjunctiva
Olfactory receptors are examples of
chemoreceptors
The lens focuses light on the photoreceptor cells by
changing shape
When all three cone populations are stimulated, one sees
white
Stereoscopic vision results when the
images in each eye are slightly different
Which one of the following is NOT true of colorblindness?
it occurs more often in women
The space between the iris and the cornea is the
anterior chamber
A device that monitors the activity of the photoreceptor cells of the eye indicates that there is a constant flow of neurotransmitters being released by the photoreceptor cells. This info implies that the subject is
in a dark room
A structure that is located at the medial cants and contains glands that produce a gritty secretion is the
lacrimal caruncle
The special senses are
all of the above
