bio 30: eye and ear

Question 1

function of cornea

Answer 1

refract light toward the pupil

Question 2

function of lens

Answer 2

focused image on the retina

Question 3

function of sclera

Answer 3

supports and protects delicate eye (outer most layer)

Question 4

function of choroid

Answer 4

contains blood vessels that nourish the retina

Question 5

function of retina

Answer 5

contains rods used for viewing in dim light and cons used for identifying colour

Question 6

function of fovea centralis

Answer 6

contains only cones, sharpest focus

Question 7

function of pupil

Answer 7

the opening in the iris that allows light into the eye

Question 8

function of iris

Answer 8

regulates the amount of light entering the eye

Question 9

function of optic nerve

Answer 9

sends the visual message from the eye to the brain

Question 10

function of pinna

Answer 10

outer part of ear that funnels the sound into the auditory canal

Question 11

function of auditory canal

Answer 11

carries the sound waves to the tympanic membrane (ear drum)

Question 12

function of tympanum

Answer 12

received sounds waves (ear drum)

Question 13

function of ossicle

Answer 13

tiny bones that amplify and carry sound into the middle ear (hammer, anvil and stirrup)

Question 14

function of cochlea

Answer 14

received sound waves and convers them into nerve impulses

Question 15

function of organ of corti

Answer 15

specialized hair cells as primary sound receptors in the cochlea

Question 16

function of auditory nerve

Answer 16

take the electrical sound impulses to the brain

Question 17

function of semicircular canals

Answer 17

fluid filled structures that provide information concerning dynamic (moving) equilibrium.

Question 18

function of eustachian tube

Answer 18

air filled tube that equalizes pressure between the outer and middle ear