Ear

Question 1

Attenuation

Answer 1

Attenuation is a general term that refers to any reduction in the strength of the signal.

Question 2

Eardrum

Answer 2

The thin membrane at the end of the outer ear

Question 3

Eustachian tube

Answer 3

The narrow tube that connects the middle ear to the throat

Question 4

Auricle

Answer 4

the visible part of the ear, located on the outside of the head

Question 5

Anvil

Answer 5

one of the middle ear bones, located between the hammer and stirrup

Question 6

Cochlea

Answer 6

The cochlea is the sense organ that translates sound into nerve impulses to be sent to the brain. Fluid filled snail shape.

Question 7

Cochlear duct(scala media)

Answer 7

The cochlear duct (or scala media) is an endolymph filled cavity inside the cochlea. Houses organ of corti.

Question 8

Organ of corti

Answer 8

a structure in the cochlea of the inner ear that produces nerve impulses in response to sound vibrations.

Question 9

Labyrinth

Answer 9

maze-like series of canals of the inner ear. This includes the cochlea, vestibule, and semicircular canals.

Question 10

Pinna

Answer 10

visible part of the outer ear; localizes sounds; discriminates sound that is coming from behind us versus in front of us, asymmetrical;

Question 11

Oval window

Answer 11

membrane between the middle ear and the inner ear.

Question 12

Semicircular canals

Answer 12

passages in the inner ear associated with maintaining equilibrium.

Question 13

Stapes

Answer 13

–transmits sound from the incus to the cochlea,( transmitting vibrations to fluid in the inner ear)

Question 14

Ampulla

Answer 14

Holds the hair cells

Question 15

Round window

Answer 15

vibrates with opposite phase to vibrations entering the inner ear through the oval window. It allows fluid in the cochlea to move, which in turn ensures that hair cells of the basilar membrane will be stimulated and that audition will occur.

Question 16

Utricle

Answer 16

respond to changes in the position of the head with respect to gravity (linear acceleration).

Question 17

Saccule

Answer 17

The sensory hair cells of the utricle and saccule provide information to the brain about head position when it is not moving

Question 18

Macula

Answer 18

It is the part of the retina that is responsible for sharp, detailed central vision (also called visual acuity).

Question 19

Perilymph

Answer 19

Perilymph (also known as Cotunnius’ liquid, and liquor cotunnii) is an extracellular fluid located within the cochlea (part of the inner ear) in two of its three compartments

Question 20

Otoliths

Answer 20

The saccule and utricle, in turn, together make the otolith organs. They are sensitive to gravity and linear acceleration.

Question 21

Incus

Answer 21

receives vibrations from the malleus, to which it is connected laterally, and transmits these to the stapes, medially.

Question 22

External auditory canal

Answer 22

SOUND WAVES ARE FUNNELED INTO THE CANAL AND AMPLIFIED; NATURAL ACIDITY HELPS TO PROTECT AGAINST INFECTIONS; SECRETES CERUMEN (EAR WAX) TO PROTECT CANAL FROM DRYING OUT; REPELS INSECTS.

Question 23

Basilar membrane

Answer 23

supports the organ of Corti in the ear and aids in translating sound vibrations into electrical signals.

Question 24

Vestibuli membrane

Answer 24

it creates a compartment in the cochlea filled with endolymph, which is important for the function of the organ of Corti.

Question 25

Malleous

Answer 25

The malleus receives vibrations from the tympanic membrane and transmits this to the incus.

Question 26

Waxy layer

Answer 26

Keeps ear moist, keeps bugs out

Question 27

Hairs

Answer 27

Protection, keeps bugs out and feeling.

Question 28

Endolymph

Answer 28

the fluid in the membranous labyrinth of the ear.