Special Senses, Vision and Hearing Flashcards Preview

Anatomy > Special Senses, Vision and Hearing > Flashcards

Flashcards in Special Senses, Vision and Hearing Deck (39):
1

What is olfaction?

smell

2

What is audition

hearing

3

What is gustation

taste

4

1) Eye/Vision: CN-II; sensitive to photons

-part of the CNS
-enables sight, but also allows light to set body clock
-voluntary and reflex

5

2) Ear/equilibrium and hearing- CN-VIII

-Sensitive to sound waves; movement and gravity
-All through the movement of hair cells

6

CN-II involves what

optic

7

CN-VIII involves what

vestibulocochlear

8

What is the cornea

The transparent portion of the fibrous layer of the anterior surface of the eye

9

What is the lateral canthus

Where the 2 eyelids meet lateral

10

What is the pupil

central opening in eye

11

What is the medial canthus

where 2 eyelids meet medial

12

What does the lacrimal apparatus do

produces and removes tears
lubricate, removes debris, provide nutrients and O_2 to the cornea and conjunctiva

13

What is the function of the sclera/cornea?

outer—fibrous, supports, protects; muscles attach; cornea focuses

14

What is the choroid?

vascular-delivers O_2 and nutrients to retina; iris; ciliary muscle/body

15

What is the retina?

inner-neural, photoreceptors(respond to light)

16

Where is the anterior chamber

cornea to iris

17

Where is the posterior chamber

iris to lens

18

What does the ciliary body do

produces aqueous humor

19

What do the suspensory ligaments of the ciliary body do

hold lens

20

What does the smooth muscle of the ciliary body do

Shapes lens(ring contracts and fattens lens)

21

What does the iris do

pupil=opening; size controlled by pupillary dilator and constrictor m.

22

What is visual axis?

line from object to retina

23

Where does light travel in order

cornea-aqueous humor-lens-vitreous body-retina-choroid

24

Describe macula

highest concentrations of photoreceptors

25

Describe fovea

depressed, central part of macula, sharpest vision(look directly at object)

26

Describe the optic nerve

carries information from the retina to the brain

27

What is the optic disc

The blind spot, that has no photoreceptors so there is no image detection

28

What is auricle

cartilage

29

What is the tympanic membrane

ear drum the separates external from middle ear

30

What is the internal acoustic meatus

lined with hair and cerumen; otitis externa
air filled

31

What are auditory ossicles

malleus, incus, stapes: connect tympani to cochlea

32

What is the auditory tube

connects middle ear with nasopharynx; equalize pressure

33

What is otitis media

infection of the middle ear

34

Describe the tympanic membrane. What is in it?

Auditory ossicles
-malleus
-incus
-stapes

35

What number is the vestibulocochlear nerve

CN-VIII

36

What is the bony labyrinth

with an internal membranous labyrinth
-fluid filled
1) Semicircular canals-rotation
2) Vestibule-gravity and linear acceleration
3) Cochlea-hearing

37

Describe semicircular canal

hair cells that respond to ROTATION(fluid only)

38

Describe vestibule

hair cells that respond to GRAVITY and LINEAR ACCELERATION
-otoliths

39

What is the cochlea's function

hearing