Sensory Mechanisms (8.10) – Part 1 Flashcards Preview

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Flashcards in Sensory Mechanisms (8.10) – Part 1 Deck (34):
1

This sensation is accomplished by mechanoreceptors located in the inner ear. (Sound is basically hairs bending.)

sensation of hearing

2

This part of the human ear is for the collection of sound waves from the external surrounding environment.

Outer Ear

3

This cartilaginous structure acts like an antenna for collecting sound waves.

Pinna

4

This concentrates the energy as it moves toward the middle ear.

auditory canal

5

This structure converts the sound wave energy into vibrations.

Tympanic Membrane (A.K.A. ear drum)

6

This part is for the amplification of energy traveling toward the inner ear.

middle ear

7

A.K.A. the hammer

Malleus

8

A.K.A. the anvil

Incus

9

This bone bangs on the oval window to create ripples inside the cochlea

Stapes (A.K.A. the stirrup)

10

These bones are responsible for amplifying the vibration energy.

malleus, incus, stapes

11

These tubes, that connects with the throat, acts as a pressure valve for the ears.

Eustachian tube

12

This structure converts the amplified vibration energy into fluid wave energy.

oval window

13

This part is where the transduction of fluid waves into electrical energy occurs – the type of energy that the brain can understand.

Inner Ear

14

“snail shell shaped” - This organ is located in the temporal bone of the skull.

Cochlea

15

The cochlea is filled with a fluid called __________. (This fluid is used to make ripples.)

perilymph

16

runs on top of the Cochlear duct. (A “vestibule” is a covering.)

Vestibular Canal

17

runs on the bottom of the Cochlear duct. It ends at the round window.

Tympanic Canal

18

The Cochlear Duct contains the Organ of ______ (Where the ______ are located.)

Corti, hairs

19

This contains the mechanoreceptor hairs

Basilar Membrane

20

This bends the hairs as the ripple energy passes over top.

Tectorial Membrane

21

Hairs bend causing neurons of the auditory nerve to create an action potential. (_______ energy).

electrical

22

This structure absorbs the ripple so as not to create waves in opposite direction.

Round Window

23

A.K.A. loudness This term refers to the sound wave height – (Tall = loud); (Small = soft)

volume

24

(A.K.A. Frequency) This term refers to the “number” of sound waves to hit the tympanic membrane per second.

Pitch

25

Pitch is measured in _________ (Hz) – (20 -20,000 – human hearing) Most animals can go much higher than humans. (Evolution? Humans have lost some hearing because of life style – blind people not so.)

hertz

26

Sensation of Balance and Motion are accomplished by __________ (hairs bending again) in the Inner Ear.

mechanoreceptors

27

This is the covering of the Utricle and Saccule – These structures are perilymph reservoirs.

Vestibule

28

There are 3 on each side of head. These are the actual organs that detect these sensations.

Semi-circular canals

29

The semi-circular canals are filled with ________ fluid.

perilymph

30

This is the swelling located at the end of a canal. This swelling contains the cupula.

Ampulla

31

This structure contains the embedded mechanoreceptors (Hairs that bend.) Movement of the body causes the perilymph to “flow” through the canals and bend the cupula hairs. Cupula bends hairs causing depolarization in neurons and the energy of motion is converted to electrical energy.

Cupula

32

This is accomplished using receptors in the nose (olfactory – means “smell”) and mouth. (gustatory – means
“taste”) Chemicals are detected by different neurons upon contact.

Sensation of Taste

33

The five taste senses are:

sweet, sour, bitter, salty, and umami

34

Taste is 80 % _____ and 20 % _______

smell, taste