Ear Flashcards
1
Q
A
- A: Auricle (pinna)
- B: Helix
- C: Lobule
2
Q
A
- A: External ear
- B: Middle ear
- C: Internal ear (labyrinth)
3
Q
A
- A: External acoustic meatus
- B: Tympanic membrane
- C: Auditory (pharyngotympanic) tube
4
Q
What is the function of the pinna?
A
To collect sound
5
Q
On what bone is the external auditory meatus located?
A
Temporal bone
Lateral 1/3rd - waxy, cartilanginous
Medial 2/3rds - bony
6
Q
A
- A: Malleus (hammer)
- B: Incus (anvil)
- C: Stapes (stirrup)
Medial to lateral: MIS –> Malleus, incus, stapes
7
Q
What are the malleus, incus and stapes?
A
Ossicles (auditory ossicles)
- Their function is the transmission of acoustic energy from tympanic membrane to inner ear
8
Q
A
- A: Malleus
- B: Incus
- C: Stapes
- D: Cochlea
- E: Middle ear
- F: Eustachian tube
9
Q
Where does the eustachian tube go?
A
Connects middle ear with nasophrynx
10
Q
A
- A: Tensor tympani
- B: Stapedius
11
Q
A
- A: Internal auditory meatus
12
Q
A
- A: Squamous region
- B: External auditory meatus
- C: Zygomatic process
- D: Manidibular Fossa
- F: Styloid process
- G: Mastoid process
13
Q
A
- A: Mastoid portion
- B: Pertous portion (pyramid) (looks like mountain ridge)
- C: Internal auditory meatus
14
Q
What is the function of the inner ear?
A
Convert mechanical sound waves to neutral impulses for recognition by brain for:
- Hearing
- Balance
15
Q
A
- A: Auditory tube
- B: Round window
- C: Vestibule
- D: Cochlea
16
Q
A
- A: Inner ear
- B: Vestibulocochlear nerve
- C: Semicircular canals
- D: Oval window
17
Q
What is the bony and membranous labyrinth filled with?
A
- Bony: Perilymph
- Membranous: Endolymph
18
Q
A
- A: Tectorial membrane
- B: Cochlear duct
- C: Organ of Corti
- D: Basilar membrane
19
Q
A
- Sound waves vibrate the tympanic membrane.
- Auditory ossicles vibrate. Pressure is amplified.
- Pressure waves created by the Stapes pushing on the oval window move through fluid in the scala vestibule
- a) Sounds with frequencies below hearing travel through the helicotrema and do not excite hair cells
b) Sounds in the hearing range go through the cochlear duct, vibrating the basilar membrane and deflecting hairs on inner hair cells
20
Q
A
- A: Tectorial membrane
- B: Outer hair cell
- C: Inner hair cell
- D: Basilar membrane
21
Q
A
- A: Semicircular ducts (within canals)
- B: Utricle
- C: Saccule
- D: Macuale
22
Q
A
- A: Macula of utricle
- B: Macula of saccule
