4

Question 1

Pupil

Answer 1

small opening in the iris through which light enters the eye

Question 2

Lens

Answer 2

Transparent part of the eye inside the pupil that focuses light into the retina

Question 3

Retina

Answer 3

lining of the eye containing receptor cells that are sensitive to light. Transduction occurs here

Question 4

Rods

Answer 4

night vision and perception of brightness

Question 5

Cones

Answer 5

color vision

Question 6

Fovea

Answer 6

area of the retina that is the center of the visual field

Question 7

Optic nerve

Answer 7

bundle of axons of ganglion cells that carries neural messages from each eye to brain

Question 8

blind spot

Answer 8

where axons of all the ganglion cells leave the eye and where there are no receptors

Question 9

Optic chiasm

Answer 9

point near the base of the brain where some fibers in the optic nerve from each eye cross to the other side of the brain

Question 10

Ear canal

Answer 10

carries sound waves into the ear

Question 11

Eardrum

Answer 11

a membrane at the end of the auditory canal that vibrates due to sound waves

Question 12

Hammer, anvil, stirrup

Answer 12

small bones in middle ear that relay vibrations

Question 13

oval window

Answer 13

membrane across the opening between the middle ear and inner ear that conducts vibrations to the cochlea

Question 14

Round window

Answer 14

membrane between middle ear and inner ear that equalizes pressure

Question 15

Cochlea

Answer 15

important; contains fluid that win rates and causes the basilar membrane to vibrate. Sound waves are converted into neural impulses

Question 16

Basilar membrane

Answer 16

vibrating membrane in the cochlea, contains receptors for sounds

Question 17

Organ of Corti

Answer 17

structure on basilar membrane that contains receptors for sound

Question 18

Auditory nerve

Answer 18

bundle of neurons that carries signals from each ear to brain

Question 19

Cornea

Answer 19

transparent protective coating over the front of the eye