Special Senses Review questions

Question 1

what is the tunic of the eye that converts visible light into nerve impulses

Answer 1

retina

Question 2

whts the transparent portion of the fibrous tunic

Answer 2

cornea

Question 3

whats the function of the iris

Answer 3

control the size of the pupil

Question 4

from the exterior, trace the journey of light through the eye

Answer 4

light would first strike the cornea, aqueous humor, lens, virueous humor, retina

Question 5

whats the external ear separate by the middle ear by

Answer 5

tympanic membrane

Question 6

name the three ossicles in the ear

Answer 6

malleus incus stapes

Question 7

whats the nerve that takes the sense of balance and hearing to the brain

Answer 7

vestibular

Question 8

true or false: Olfactory adaption means that the olfactory receptors become more sensitive to the presence of an odor

Answer 8

true

Question 9

t/f: the size of the pupil is dependent on the contraction of the muscles of the iris

Answer 9

T

Question 10

t/f: the rods of the retina operate in bright light and provide high acuity vision

Answer 10

F

Question 11

t/f the area of the retina with the highest visual activity is called the optic disc

Answer 11

F

Question 12

describe the journey of sound through the ear, starting at the first structure sound waves hit

Answer 12

Sound waves beat against a large membrane of the outer ear called the eardrum or cremonus. these vibrations are transferred by three small m=bones, malleus, incus, stapes, which amplify the vibrations. The stapes presses against the oval window, which vibrates and transmits the vibrations to the fluid of the cochlea

Question 13

trace the travel of sound through the ear more specfically

Answer 13

Tympanic membrane vibrates- malleus,incus, stapes, which amplifies the sound- stapes vibrates oval window(membrane covered, cerocilia in oval window vibrate, cerocilia are different lengths, vibrate mechanoreceptors

Question 14

macula

Answer 14

most photoreceptors, in the macula is the fovea centralis where there are the most photoreceptors

Question 15

optic disc

Answer 15

blind spot

Question 16

what happens to the lens when you’re looking at objects up close

Answer 16

the lens flattens

Question 17

Whats in an animal’s eye that makes it reflect light

Answer 17

Tapedum Lucidum

Question 18

what structure in the ear serves to dampen the movement of fluid w/in the choclea

Answer 18

round window

Question 19

what does the baislor membrane do in repsonse to sound transmitted throught the fluid-filled cochlea

Answer 19

the baislar membrane VIBRATES in response to sound transmitted through the fluid-filled cochlea

Question 20

Within the cochlear duct(middle canal) and atop the basilar membrane is what?

Answer 20

the organ of Corti

Question 21

what does the movement of fluid in the cochlea produce?

Answer 21

movement of fluid in the cochlea produces vibrations that bend the sterocilia, triggering action potentials

Question 22

describe rods

Answer 22

• Noncolor vision (one visual pigment)
• High sensitivity; function in dim light
• Low acuity (many rods converge onto one ganglion cell)
• More numerous (20 rods for every cone)
• Mostly in peripheral retina

Question 23

describe cones

Answer 23

• Color vision (three visual pigments)
• Low sensitivity; function in bright light
• High acuity (one cone per ganglion cell in fovea)
• Less numerous
• Mostly in central retina