ear structure and function Flashcards
1
Q
what is “echolocation”?
A
- where animals make a “sound picture using sonar”
2
Q
how is sound used in echolocation?
A
- sounds (clicks) bounce off objects
- brain then calculates the distance and direction
3
Q
what are the three sections of the ear?
A
outer ear, middle ear, inner ear
4
Q
what two things consist of the outer ear?
A
- pinna
- ear canal
5
Q
what is the function of the ear pinna?
A
collects and focuses sound waves
6
Q
what is the function of the ear canal?
A
- collects sound travelling from pinna
- contains wax secreting cells
7
Q
what two things consist of the middle ear?
A
- ear drum
- ossicles
8
Q
what is the ear drum known as?
A
“tympanic membrane”
9
Q
what is the function of ear drum?
A
transmits vibrations from sound to the inner ear and acts as an amplifier
10
Q
what are the ossicles?
A
three small bones found in the ear
11
Q
what consists of the ossicles?
A
- hammer (malleus)
- anvil (incus)
- stirrup (stapes)
12
Q
what is the hammer ossicle also known as?
A
the malleus
13
Q
what is the anvil ossicle also known as?
A
the incus
14
Q
what is the stirrup also known as?
A
the stapes
15
Q
what is the ossicles function?
A
- bones vibrate due to the vibration of the ear drum
- then transmit vibrations to inner ear
