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Question
The following diagram refers to the ear of a mammal.
(i) Label the parts 1 to 10 to which the guidelines point.
(ii) Which structure:
(a) converts sound waves into mechanical vibrations?
(b) Converts vibrations into nerve impulses?
(c) Responds to change in position?
(d) Transmits impulses to the brain?
(e) Equalizes atmospheric pressure and pressure in the ear.
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Solution
(i)
1. Cochlea.
2. Auditory nerve.
3. Semi-circular canals.
4. Ear ossicles.
5. Auditory meatus.
6. Pinna.
7. Er drum.
8. Fenestra rotunda.
9. Eustachian tube.
10. Fenestra ovalis.
(ii)
(a) Ear drum or tympanum.
(b) An organ of Corti.
(c) Semi-circular canals.
(d) Auditory nerve.
(e) Eustachian tube.
RELATED QUESTIONS
Answer the following:
Which part of the ear determines the pitch of a sound?
Note the relationship between the first two words and suggest the suitable word for the fourth place.
sound : ear drum :: Dynamic balance : ……
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Cochlea, tympanum, auditory canal, ear ossicles, oval window.
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The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?
State the Function:
Endolymph
The part of the ear that turns pressure variations into electrical signals is ______.
The part of the inner ear which is responsible for hearing is ______.
Define the following term:
Ear ossicles
