11.1 Sensation Part 2

Question 1

What makes up the inner ear?

Answer 1

cochlea, semicircular canals, utricle, saccule

Question 2

What aids in the sense of balance in the ear?

Answer 2

semicircular canals
utricle
saccule

Question 3

What is the round window?

Answer 3

membrane covered hole in the cochlea near the oval window that releases excess pressure

Question 4

What is the eustachian tube?

Answer 4

passageway from the back of the throat to the middle ear that functions to equalize pressure on both sides of the eardrum

Question 5

What is the summary of hearing?

Answer 5

sound waves → auricle → external auditory canal → tympanic membrane → malleus → incus → stapes → oval window → perilymph → endolymph → basilar membrane → auditory hair cells → tectorial membrane → neurotransmitters stimulate bipolar auditory neurons → brain → perception

Question 6

What is pitch?

Answer 6

frequency

Question 7

How is pitch distinguished in the ear?

Answer 7

regions of the basilar membrane that vibrate and stimulate different auditory neurons

Question 8

What is loudness?

Answer 8

distinguished by the amplitude of the vibration in the ear

Question 9

How do we determine the location of sound?

Answer 9

two ears allows for stereophonic hearing

Question 10

What is the auditory cortex?

Answer 10

where sound stimuli is processed in the brain in the temporal lobe

Question 11

What does the vestibular system consist of?

Answer 11

three semicircular canals (utricle, saccule, and ampullae)

Question 12

What is the cornea?

Answer 12

clear portion at the front of the eyes

Question 13

What is the sclera?

Answer 13

white portion of the eye

Question 14

What is the choroid?

Answer 14

layer beneath the sclera that contains darkly pigments cells which absorb excess light in the eye

Question 15

What is the retina?

Answer 15

surface upon which light is focused; located at the back of the eye

Question 16

Where is the anterior chamber of the eye and what does it contain?

Answer 16

inside the cornea, contains aqueous humor

Question 17

What is the iris?

Answer 17

membrane at the back of the anterior chamber; colored portion of the eye

Question 18

What is the pupil?

Answer 18

opening of the iris

Question 19

Where is the posterior chamber of the eye located?

Answer 19

just behind the iris

Question 20

Where is the lens located and what is its function?

Answer 20

back of the posterior chamber; functions to fine tune the angle of the incoming light so the beams are focused perfectly on the retina