Light is a good stimulus for a sensory system because:
A)it travels very quickly
B)it travels in predictable paths
C)it exists in abundance
D)all of the above
D
Inverse optics is:
A)the process by which the visual system develops
descriptions of objects from the pattern of light on the retina
B)the process by which the visual system un-inverts
the retinal image
C)the practice by which eye doctors correct optical deficiencies
D)the fact that evolution placed the photoreceptors
beneath the rest of the retina
A
As a rule ________ animals have _______-placed eyes which _________
binocular overlap.
A)prey; frontally; maximize
B)predator; frontally; minimize
C)prey; laterally; maximize
D)predator; frontally; maximize
D
We move our eyes because:
A)our field of view is limited by the nose
B)our retinas do not have uniform visual acuity
C)otherwise our visual acuity would be degraded by jitter
D)of all of the above
B
If the superior and lateral rectus muscles of the right eye were to
contract at the same time, the eye would move:
A)up and to the left
B)up and to the right
C)down and to the left
D)down and to the right
B
The oblique muscles of the eye are responsible for which kinds of eye movements?
A)conjunctive
B)vergence
C)torsional
D)transverse
C
Blink suppression is demonstrated by the:
A)noticeable blackout during a blink
B)increase in the number of blinks in social situations
C)reduced ability to notice a change in the
brightness of a light during a blink
D)decrease in the size of the opening of the lids
with reduced interest
C
Tears protect the surface of the eye by:
A)flushing away debris
B)minimizing lid movement
C)containing an antimicrobial agent
D)both a and c
D
Which of these is NOT a layer of the eye?
A)vascular tunic
B)fibrous tunic
C)vitreous tunic
D)retina
C
The anterior chamber of the eye is between the _______ and the _______.
A)vitreous chamber; lens
B)cornea; iris
C)optic disc; fovea
D)pupil; vitreous chamber
B
The choroid serves to:
A)nourish the photoreceptors
B)focus the image on the retina
C)maintain the shape of the eyeball
D)control the amount of light entering the eye
A
When the pupil contracts, the intensity of light on the retina
________ and the depth of field ________.
A)increases; increases
B)increases; decreases
C)decreases; increases
D)decreases; decreases
C
The crystalline lens is primarily responsible for:
A)most of the eye's optical power
B)accommodation
C)controlling the depth of field
D)filtering debris from the anterior chamber
B
Glaucoma is caused by:
A)increased intraocular pressure
B)yellowing of the crystalline lens
C)hardening of the crystalline lens
D)a misshapen cornea
A
Which of these is NOT a retinal cell type?A)photoreceptor
B)amacrine
C
)basket
D)horizontal
C
An eyeball that is too short for its optics is:
A)hyperopic
B
)myopic
C)emmetropic
D)astigmatic
A
Myopia can be corrected using what kind of lens?
A)convex
B)concave
C)asymmetrical
D)inverted
B
Which of these statements about the fovea is FALSE?
A)The structures overlying the photoreceptors have
been pushed to the side.
B)There are virtually no rods inside of it.
C)It sits in the middle of the macula.
D)It is where the retinal ganglion cells axons exit
the eye.
D
Most of the ________ cones are found in the ___________ of the retina.
A)5 million; periphery
B)5 million; fovea
C)100 million; periphery
D)100 million; fovea
B
The process by which light is converted into nerve cell activity is called:
A)phototransduction
B)photopigmentation
C)phototransmission
D)photoconjunction
A