The structure that controls the amount of light entering the eye is
a) iris
b) lens
c) cornea
d) pupil
Two structures that respond to changes in light intensity are
a) choroid and optic disc
b) choroid and iris
c) cornea and iris
d) cornea and lens
Some children like to twirl around in one place. after they stop twirling, they feel as though they are still moving. This feeling is caused by continued
a) transmission of nerve impulses from cochlea to vestibular nerve
b) movement of fluid against cochlea
c) vibrations of tympanum
d) movement of fluid in semicircular canals
Focusing to adjust for changes in object distance is accomplished primarily by
a) lens
b) iris
c) retina
d) optic disc
An area of the eye where sensory reception of light is most acute and an area where there is no such reception are
a) retina and optic disc
b) optic disc and cornea
c) cornea and lens
d) lens and retina
What converts sound energy and light energy into nerve impulses?
a) In the ear the tympanum and in the human eye the lens
b) In the ear the cochlea and in the human eye the retina
c) In the ear the auditory canal and in the human eye the cornea
d) In the ear the vestibular nerve and in the human eye the central artery/ vein
Sensory receptors for equilibrium and balance are found in the
a) Eustachian tube
b) Cochlea
c) semicircular canals
d) Auditory canal
What acts to transfer sound vibrations mechanically from a fluid into nerve impulses?
a) Cochlea
b) Tympanum
c) Semicircular canals
d) Bone ossicles
What converts sound waves to mechanical vibrations to amplify these vibrations?
a) Tympanum and Bone ossicles
b) Bone ossicles and vestibular nerve
c) Cochlea and Semicircular canals
d) Cochlea and Eustachian tube
Motor neurons transmits impulses
a) to the motor region of the brain
b) to a sensory neuron
c) to a muscle or a gland
d) from a muscle or gland
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