How we hear !! Flashcards
1
Q
What does the outer ear do?
A
- Collects sound
- Amplifies sound
- Protects the rest of ear
- Sensitive
2
Q
What does the middle ear do?
A
3
Q
What is the Estashion tubes job?
A
- Ventilate
- Drainage
- Protection
4
Q
What are the three bones and two muscles in the middle ear?
A
Bones= Malleus (Hammer) Incus (Anvil) Stapes (Stirrup) Muscles= Stapedius Tensor tympani
5
Q
What do we know about the outer hair cells?
A
“V” shaped in three rows
The loss of outer hair cells makes it harder to hear
6
Q
What do we know about Inner hair cells?
A
- they don’t grow back
- Lengths differ and have different jobs
- they open and close
- Direct innervation of afferent fibres
- Indirect innervation of efferent fibres
7
Q
What is the ear canal?
A
- The outer 1/3 or half; Skin covered cartilage that contains glands that produce cerumen
- Inner 2/3 or half; Skin covered bone (temporal lobe)
8
Q
What is the ear canal?
A
- The outer 1/3 or half; Skin covered cartilage that contains glands that produce cerumen
- Inner 2/3 or half; Skin covered bone (temporal lobe)
9
Q
What is the cochlea?
A
-Fluid filled space resembling a snail shell
REFER TO PHOTO
