CH 15 - Senses - Practice Exam

Question 1

Which of the following structures is NOT part of the external ear?

a.) pharyngotympanic tube
b.) tympanic membrane
c.) pinna
d.) external acoustic meatus

Answer 1

a.) pharyngotympanic tube

Question 2

Motion sickness seems to ____.

a.) result from activation of nausea centers in the brainstem
b.) result from mismatch between visual and vestibular inputs
c.) respond best to medication taken after salivation and pallor begins
d.) respond best to medication that “boosts” vestibular inputs

Answer 2

b.) result from mismatch between visual and vestibular inputs

Question 3

Receptors for hearing are located in the ____.

a.) tympanic membrane
b.) vestibule
c.) cochlea
d.) semicircular canals

Answer 3

c.) cochlea

Question 4

Light passes through the following structures in which order?

a.) cornea, aqueous humor, lens, vitreous humor
b.) cornea, vitreous humor, lens, aqueous humor
c.) aqueous humor, cornea, lens, vitreous humor
d.) vitreous humor, lens, aqueous humor, cornea

Answer 4

a.) cornea, aqueous humor, lens, vitreous humor

Question 5

An essential part of the maculae involved in static equilibrium are the ____.

a.) scala media
b.) otoliths
c.) cupula
d.) spiral organ (of Corti)

Answer 5

b.) otoliths

Question 6

Conscious perception of vision probably refects activity in the ____.

a.) chiasma
b.) superior colliculus
c.) occipital lobe of the cortex
d.) thalamus

Answer 6

c.) occipital lobe of the cortex

Question 7

The oval window is connected directly to which passageway?

a.) pharyngotympanic tube
b.) scala vestibule
c.) scala tympani
d.) external acoustic meatus

Answer 7

b.) scala vestibule

Question 8

The blind spot of the eye is where ___.

a.) the macula lutea is located
b.) only cones occur
c.) the optic nerve leaves the eye
d.) more rods than cones are found

Answer 8

c.) the optic nerve leaves the eye

Question 9

Which of the following is NOT a possible cause of conduction deafness?

a.) impacted cerumen
b.) osteosclerosis
c.) cochlear nerve degeneration
d.) middle ear infection

Answer 9

c.) cochlear nerve degeneration

Question 10

What is the main function of the rods in the eye?

a.) depth perception
b.) accommodation for near vision
c.) vision in dim light
d.) color vision

Answer 10

c.) vision in dim light

Question 11

What structure regulates the amount of light passing to the visual receptors of the eye?

a.) cornea
b.) aqueous humor
c.) lens
d.) iris

Answer 11

d.) iris

Question 12

Olfactory cells and taste buds are normally stimulated by ____.

a.) substances in solution
b.) movement of a cupula
c.) the movement of otoliths
d.) stretching of the receptor cells

Answer 12

a.) substances in solution

Question 13

Which of the following types of neurons are replaced throughout adult life?

a.) retinal bipolar cells
b.) retinal ganglion cells
c.) olfactory receptor cells
d.) auditory outer and inner hair cells

Answer 13

c.) olfactory receptor cells

Question 14

Seventy percent of all sensory receptors are located in the ____.

a.) nose
b.) skin
c.) eye
d.) ears

Answer 14

c.) eye

Question 15

Nerve fibers from the medial aspect of each eye ____.

a.) pass posteriorly without crossing over at the chiasma
b.) divide at the chiasma, with some crossing and some not crossing
c.) go to the superior colliculus only
d.) cross over to the opposite side of the chiasma

Answer 15

d.) cross over to the opposite side of the chiasma

Question 16

The cells of the retina in which action potentials are generated are the ____.

a.) bipolar cells
b.) ganglion cells
c.) rods and cones
d.) amacrine cells

Answer 16

b.) ganglion cells

Question 17

Dark adaptation _____.

a.) results in inhibition of rod function
b.) involves improvement of acuity and color vision
c.) is much faster than light adaptation
d.) involves accumulation of rhodopsin

Answer 17

d.) involves accumulation of rhodopsin