Ch 17

Question 1

Which of the following structures carries action potentials generated by sound transduction?
a) vagus nerve
b) basilar membrane
c) tympanic membrane
d) organ of Corti
e) vestibulocochlear nerve

Answer 1

e) vestibulocochlear nerve

Question 2

Which of the structures listed below converts vibrations in the endolymph into action potentials?
a) macula
b) pinna
c) tympanic membrane
d) organ of Corti
e) cupula

Answer 2

d) organ of Corti

Question 3

When sound waves strike this structure, they cause it to vibrate back and forth.

cochlea
b) pinna
c) tympanic membrane
d) organ of Corti
e) vestibulocochlear nerve

Answer 3

c) tympanic membrane

Question 4

Binocular vision
a) gives better depth perception.
b) provides more accurate color vision.
c) is only seen in humans.
d) occurs when one eye focuses on two separate objects. e) is all of these choices

Answer 4

a) gives better depth perception.

Question 5

The first step in the visual transduction process that occurs in the retina is
a) activation of amacrine cells.
b) absorption of scattered light by the pigmented epithelium. c) interruption of the dark current.
d) absorption of light by photopigments.
e) generation of action potentials in the optic nerve.

Answer 5

d) absorption of light by photopigments

Question 6

Which of the types of receptors listed below is primarily used for detecting light rays under bright light conditions?
a) olfactory hair cells
b) rods
c) cones
d) ganglion neurons e) amacrine cells

Answer 6

cones

Question 7

This darkly pigmented structure reduces light reflection within the eyeball.
a) Sclera
b) Conjunctiva c) Iris
d) Choroid
e) Retina

Answer 7

Choroid

Question 8

This outer layer of dense connective tissue serves to protect the inner parts of the eyeball.
a) Sclera

b) Pupil
c) Iris
d) Cornea
e) Retina

Answer 8

Sclera

Question 9

This lies between the lens and the retina.
a) Vitreous chamber

b) Anterior chamber
c) Anterior cavity
d) Cornea
e) Aqueous humor

Answer 9

a) Vitreous chamber

Question 10

The lens is made of layers of proteins called
a) choroids.
b) ciliary bodies.
c) crystallins.
d) cones.
e) rods.

Answer 10

crystallins

Question 11

Which of the following structures senses change in rotational acceleration of the head in order to help maintain dynamic equilibrium?
a) cochlea
b) semicircular canals
c) maculae of the vestibule d) organ of Corti
e) vestibulocochlear nerve

Answer 11

b) semicircular canals