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प्रश्न
Name the respective organs in which the following are located and mention the main function of each:
(i) Iris
(ii) Semicircular canals
उत्तर
(ii) Semicircular canals: It is located in the inner ear. These are concerned with the body equilibrium.
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संबंधित प्रश्न
Write the function of retina in human eye.
Fill in the following blank with suitable word:
To bring light from a distant object to a focus on the retina of the eye, the convex eye-lens needs to be made..........
List, in order, the parts of the eye through which light passes to reach the retina.
How does the eye change in order to focus on near or distant objects?
(a) The lens moves in or out
(b) The retina moves in or out
(c) The lens becomes thicker or thinner
(d) The pupil gets larger or smaller
An object is moved closer to an eye. What changes must take place in the eye in order to keep the image in sharp focus?
Give the main function of the following:
Three semicircular canals
Choose the correct answer.
Rods are receptor of ______________
The figure below compares a part of our eye with a part of a photographic camera.
Explain the mode of working and the functions of the parts of the eye mentioned above.
Draw a diagram of the human eye as seen in a vertical section and label the parts which suit the following descriptions relating to the:
(i) photosensitive layer of the eye.
(ii) structure which is responsible for holding the eye lens in its position.
(iii) structure which maintains the shape of the eyeball and the area of no vision.
(iv) anterior chamber seen in front of the eye lens.
(v) outermost transparent layer seen in front of the eyeball.
Give Technical Term:
Name the part of the retina on which an object is focused for the clearest vision.
Give Technical Term:
The nutritive layer of the eye which also presents reflection of light.
The muscular diaphragm that controls the size of the pupil is ____________.
The pigmented circular area seen in front of the eye:
In the figure of the human eye, the cornea is represented by the letter
Which cells of the retina enable us to see coloured objects around us?
Match the following:
| Column - I | Column - II |
| 1. Retina | a. Path way of light |
| 2. Pupil | b. Far point comes closer |
| 3. Ciliary muscles | c. near point moves away |
| 4. Myopia | d. Screen of the eye |
| 5. Hypermetropia | e. Power of accommodation |
With reference to human eye, answer the following question.
What is aqueous humor?
Vitreous humour is present between ______.
Assertion (A): Rods and Cones are photoreceptors in the sclera of eyeball.
Reason (R): Rods are sensitive to dim light.
With reference to human eye answer the question that follow:
Name the part of the eye associated with the regulation of the size of pupil.
