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Multiple Choice Quiz
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1
The interpretation of sensory impulses as sensations is the function of the
A)sensory receptors.
B)cerebral cortex.
C)sensory neurons.
D)spinal cord.
2
The intensity of a sensation is proportional to the ________ of impulses received by sensory areas of the cerebrum.
A)strength
B)duration
C)size
D)frequency
3
________ are the sensory receptors for pain.
A)Pacinian corpuscles
B)Meissner’s corpuscles
C)Free nerve endings
D)None of these choices.
4
A woman applies perfume and immediately detects the scent. But after a short time, she cannot detect the scent. Why does this occur?
A)It is cheap perfume
B)Olfactory receptors have become adapted and no longer form impulses
C)Olfactory centers in the brain ignore the incoming impulses
D)The strength of the impulses has diminished
5
Chemoreceptors for taste are _________ , which can only detect chemicals that are _________ in a liquid.
A)taste cells; dissolved
B)taste buds; dissolved
C)taste papillae; not dissolved
D)taste cells; not dissolved
6
The receptors for sound stimuli are located in the
A)middle ear.
B)vestibule.
C)cochlea.
D)semicircular canals.
7
Sound stimuli are transmitted from the tympanic membrane to the oval window by the
A)external auditory canal.
B)ear ossicles.
C)auditory tube.
D)tympanic cavity.
8
Vibrations of the perilymph produce vibrations in the ________ causing hair cells in the ________ to form impulses that the brain interprets as sound sensations.
A)endolymph; macula
B)endolymph; crista ampullaris
C)vestibular membrane; macula
D)basilar membrane; organ of Corti
9
In the maintenance of dynamic equilibrium, turning the head causes movement of endolymph in the _________ stimulating the hair cells of the _________ to form impulses, which are sent to the brain.
A)cochlea; organ of Corti
B)semicircular canals; macula
C)semicircular canals; crista ampullaris
D)utricle; macula
10
Tears are secreted by the __________, flow across the surface of the eye, and drain into the _________ via the superior and inferior canaliculi.
A)lacrimal gland; lacrimal sac
B)lacrimal ducts; nasolacrimal duct
C)conjunctiva; nasolacrimal duct
D)conjunctiva; lacrimal sac
11
Light receptors in the _________ form impulses that are transmitted to the brain via the ________ nerve.
A)sclera; optic
B)choroid; oculomotor
C)retina; optic
D)cornea; oculomotor
12
The _________ is the retinal area for sharpest, bright-light vision, and it contains densely packed ________.
A)optic disk; neurons
B)fovea centralis; cones
C)fovea centralis; rods
D)optic disk; rods and cones
13
Light rays entering the eye are first bent by the ________ and finely focused on the retina by the _________.
A)cornea; vitreous humor
B)iris; lens
C)lens; vitreous humor
D)cornea; lens
14
The ________ controls the amount of light entering the eye.
A)cornea
B)conjunctiva
C)lens
D)iris
15
_________ results when light rays are focused in front of the retina.
A)Farsightedness
B)Nearsightedness
C)Blindness
D)Color blindness







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