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प्रश्न
The figure given below shows the principal parts of a human ear. Study the diagram and answer the following questions.
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- Label the parts 1 to 8.
- State the role of parts 6, 7 and 8.
- Why is it harmful to use a sharp object to remove ear wax? Mention the number and name of the part involved.
उत्तर
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- Pinna
- Ear drum
- Ear canal
- Hammer
- Semi-circular canal
- Cochlea
- Vestibular portion of auditory nerve.
- Eustachian Tube
- Part 6 (Cochlea): It contains sensory cells for hearing.
Part 7 (Auditory Nerve): It transmits the impulse of hearing to the brain.
Part 8 (Eustachian Tube): It equalises air pressure on both sides of the tympanum. - Sharp objects may damage the (part 3) ear drum and cause deafness. Deafness can result from eardrum or tympanic ruptures.
संबंधित प्रश्न
Write short notes on the following Ear ossicles
Write short notes on the following: Cochlea
Explain the following:
Mechanism through which a sound produces a nerve impulse in the inner ear.
Time taken by an object to complete one oscillation is called ___________.
The unit of frequency is ______.
Given below is a representation of a kind of pollution. Study the same and answer the questions that follow
(i) Name the kind of pollution.
(ii) List any three common sources of this pollution.
(iii) Mention three harmful effects of this pollution on human health.
(iv) Explain the term ‘Pollutant’.
(v) Name two soil pollutants
(i) Draw a well labelled diagram of the membranous labyrinth found in the inner ear.
(ii) Based on the diagram drawn above in (i) give a suitable term for each of the following descriptions :
1. The sensory cells that helps in hearing.
2. The part that is responsible for static balance of the body.
3. The membrane covered opening that connects the middle ear to the inner ear.
4. The fluid present in the middle chamber of cochlea.
5. The structure that maintains dynamic equilibrium of the body.
Briefly explain the following terms: Power of accommodation
Name the following:
The tube which connects the cavity of the middle ear with the throat.
Where is the oval window located? Briefly mention its function.
Where is the Utriculus located? Briefly mention its function.
With reference to the human ear, answer the question that follow:
Name the nerve, which transmits messages from the ear to the brain.
Choose the correct answer :
Organ of corti is found in ___________
Verify experimentally the laws reflection of sound.
Select the CORRECT match of part of the human ear and its function.
Mention the name of passage is the outer ear which carries sound waves to the eardrum.
Give reason:
Three small bones of ear ossicles are advantageous as compared to one single bone for hearing.
With reference to human ear answer the question that follow:
Name the part of the ear associated with Static balance.
