Multiple Choice Quiz


1	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.


2	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.


3	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


4	Which of these is not a reason for the presence of eye movements in the human visual system?
		A)	non-uniform visual acuity across the retina
		B)	enlarged field of view due to eye placement
		C)	gray-outs resulting from a lack of change in the retinal image
		D)	relative slowness of head and body movements


5	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.


6	The oblique muscles of the eye are responsible for which kinds of eye movements?
		A)	conjunctive
		B)	vergence
		C)	torsional
		D)	transverse


7	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


8	Tears protect the surface of the eye by
		A)	flushing away debris.
		B)	minimizing lid movement.
		C)	containing an antimicrobial region.
		D)	both a and c.


9	Which of these is not a layer of the eye?
		A)	vascular tunic
		B)	fibrous tunic
		C)	vitreous tunic
		D)	retina


10	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


11	The choroids 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.


12	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


13	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.


14	Glaucoma is caused by
		A)	increased interocular pressure.
		B)	yellowing of the crystalline lens.
		C)	hardening of the crystalline lens.
		D)	a misshapen cornea.


15	Which of these is not a retinal cell type?
		A)	photoreceptor
		B)	amacrine
		C)	basket
		D)	horizontal


16	An eyeball that is too short for it's optics is
		A)	hyperopic.
		B)	myopic.
		C)	emmetropic.
		D)	astigmatic.


17	Myopia can be corrected using what kind of lens?
		A)	convex
		B)	concave
		C)	asymmetrical
		D)	inverted


18	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.


19	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


20	The process by which light is converted into nerve cell activity is called
		A)	phototransduction.
		B)	photopigmentation.
		C)	phototransmission.
		D)	photoconjunction.

2002 McGraw-Hill Higher Education
Any use is subject to the Terms of Use and Privacy Policy.
McGraw-Hill Higher Education is one of the many fine businesses of The McGraw-Hill Companies.