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प्रश्न
Briefly explain the following terms: Power of accommodation
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उत्तर
Power of accommodation:
The ability of the eye to adjust itself and to focus objects at different distances is known as the power of accommodation. The ciliary muscles contract and make the lens thicker to view nearby objects clearly, whereas they relax and make the lens thinner to focus on distant objects.
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संबंधित प्रश्न
Write short notes on the following: Cochlea
- Draw a well-labelled diagram of the membranous labyrinth found in the inner ear.
- Based on the diagram drawn above in (i), give a suitable term for each of the following descriptions:
- The sensory cells that help in hearing.
- The part that is responsible for static balance of the body.
- The membrane-covered opening that connects the middle ear to the inner ear.
- The fluid present in the middle chamber of cochlea.
- The structure that maintains dynamic equilibrium of the body.
The exact location of the Yellow spot
Name the following:
The ear ossicle attached to the tympanum.
Mention if the following statement is true (T) or false (F) Give reason.
The auditory nerve is purely for perceiving sound
Given below is the diagram of a part of the human ear. Study the same and answer the questions that follow:
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Give the collective biological term for Malleus, locus and Stapes.
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?
The hearing range of the human ear is ______.
The part of the ear that turns pressure variations into electrical signals is ______.
The eardrum is known as ______.
