Chapter 16 Quiz

Perilymph is located in the 1. scala tympani 2. cochlear duct 3. bony labyrinth of the semicircular ducts (canals) a. 1 and 3 b. 1 and 2 c. 2 only d. 3 only e. 1 only

a. 1 and 3

Which is the correct order of events of sound transmission through the ear? 1. sound waves strike the eardrum 2. the ear ossicles vibrate 3. hair cells of the organ of Corti vibrate 4. the perilymph in the cochlea moves 5. sound waves enter the external auditory canal a. 5, 1, 2, 4, 3 b. 5, 2, 1, 3, 4 c. 1, 2, 3, 4, 5 d. 5, 4, 3, 2, 1

a. 5, 1, 2, 4, 3

Which figure illustrates farsightedness before it has been corrected? a. B b. A c. E d. C e. D

a. B

Cones a. allow color vision. b. are concentrated at the periphery of the retina. c. outnumber rods. d. function only at low light levels. e. are most critical for night

a. allow color vision

Which structure within the ampulla contains hair cells that are involved in dynamic equilibrium? a. crista b. otolithic membrane c. macula d. cupola e. vestibular

a. crista

Which of the following structures contains otoliths (ear stones)? a. Macula of the saccule b. Tympanic membrane c. Basilar membrane of the cochlear duct d. Cupula of the crista e. Tectorial membrane of the organ of Corti

a. macula of the saccule

The axons of the ganglion neurons of the retina terminate in the a. thalamus. b. primary somatosensory area of cerebral cortex. c. optic disk. d. visual cortex of cerebrum. e. optic chiasm.

a. thalamus

The blind spot is the area where a. the optic nerve exits the eye. b. the ciliary process produces aqueous humor. c. there are more rods than cones. d. there are more cones than rods. e. the iris attaches to the cornea.

a. the optic nerve exits the eye

What is the name of the structure labeled with the arrow? a. Vestibular branch of cranial nerve b. Auditory tube c. Tympanic tube d. Middle ear e. Cochlear branch of cranial nerve

b. auditory tube

What is the name of the structure labeled with the arrow? a. Choroid b. Sclera c. Cornea d. Iris e. Retina

b. sclera

Which of the following is NOT true about rods? a. They are more numerous than cones in the retina. b. They are most numerous in the central region of the retina. c. They are responsible for night vision. d. They generate receptor potentials. e. They contain the photopigment rhodopsin.

b. they are the most numerous in the central region of the retina

Which portion of the inner ear is divided into three channels? a. B b. C c. D d. None of these choices e. A

c. D cochlea

The point of greatest visual acuity in the retina is the a. optic chiasm. b. optic disk. c. central fovea. d. lens.

c. central fovea

Which structure transduces mechanical vibrations into electrical signals? a. supporting cells b. tympanic membrane c. hair cells d. oval window e. photoreceptors

c. hair cells

Which is NOT part of the vasculartunic of the eye? a. Iris b. Ciliary muscle c. Scleral venous sunus (Canal of Schlemm) d. Ciliary process e. Choroid

c. scleral venous sinus (canal of schlemm)

How many extrinsic eye muscles are responsible for moving each eye? a. 12 b. 20 c. 4 d. 6 e. 10

d. 6

Identify the ciliary body. a. A. b. B. c. C. d. D. e. E.

d. D

Which of the following structures senses change in rotational acceleration of the head in order to help maintain dynamic equilibrium (rotational acceleration)? a. Organ of Corti b. Vestibulocochlear nerve c. Cochlea d. Cupula e. Maculae of the vestibule

d. cupula

Which of the structures listed below converts vibrations in the endolymph into action potentials? a. Tympanic membrane b. Auditory ossicles c. Crista ampularis d. Organ of Corti e. Helicotrema

d. organ of corti

What lies between the lens and the retina? a. Anterior cavity b. Aqueous humor c. Anterior chamber d. Posterior cavity (Vitreous chamber) e. Cornea

d. posterior cavity (vitreous chamber)