the ear

Question 1

Jessie is listening to music

explain how the sound of the music reaches Jessie’s brain (6marks)

Answer 1

• External ear funnels sound waves from music source to ear
• sound waves cause the eardrum to vibrate
• vibrations carried across middle ear by ossicles
• sound magnified
• vibrations cause rippling in membranes within organ of corti
• nerve endings in organ of corti sends impulses to the brain via the auditory nerve

Question 2

what are the external parts of the ear?

readapted from exam paper

Answer 2

-pinna

Question 3

what are the internal parts of the ear?

readapted from exam paper

Answer 3

• ear canal
• ear drum
• cochlea
• eustachian
• round window
• auditory nerve
• semi circular canals

Question 4

what are the 3 tiny bones in the ear?

readapted from exam paper

Answer 4

• malleus- hammer
• stape- stirrup
• incus- anvil

Question 5

Sound is chanelled through the ———– where ut causes a vibration in the ——-. the vibrations are amplifies as they pass along the 3 auditory ossicles or bones in the middle ear. the vibration then enters the coiled chamber called the —– in the inner ear. electrical signals are transmitted along the —— —- to the brain.

Answer 5

external ear
eardrum
cochlea
auditory nerve

Question 6

explain how a malfunction in the ear may impact on an individuals lifestyle

Answer 6

• isolation
• inattentiveness
• distraction/lack of attention
• problems participating in social activities
• could impact their job
• frustration/ anger

Question 7

identify one function of the semi-circular canals

Answer 7

• keeping upright
• for balance
• detecting changes of speed
• acceleration
• deceleration

Question 8

The middle ear is a chamber filled with ________________________ between the
________________________ and the inner ear. The ________________________
connects the middle ear to the throat and ensures that the pressure of the middle ear is
equal to the pressure outside the ear. The ________________________ is one of three
small bones that transmit vibrations across the middle ear to the oval window.

air, cochlea, ear drum, Eustachian tube,
fluid, incus, round window

Answer 8

air
eardrum
eustachian tube
incus

Question 9

one malfunction of the ear

Answer 9

deafness