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प्रश्न
Choose the correct answer.
Rods are receptor of ______________
पर्याय
twilight vision
colour vision
sound wave
odour
उत्तर
Rods are receptor of twilight vision
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संबंधित प्रश्न
Name the part of the eye:
which controls the amount of light entering the eye.
Name the part of the retina which is insensitive to light.
Fill in the following blank with suitable word:
To bring light from a near object to a focus on the retina of the eye, the convex eye-lens need to be made....................
What changes take place in the shape of eye-lens:
when the eye is focused on a near object?
What happens to the eye when you enter a darkened cinema hall from bright sunshine? Give reason for your answer.
Refraction of light in the eye occurs at:
(a) the lens only
(b) the cornea only
(c) both the cornea and the lens
(d) the pupil
Name the muscles of the eye responsible for the power of accommodation.
Give scientific reason:
One can sense colours only in bright light.
The diagram alongside represents a certain defect of vision of the human eye.
(i) Name the defect.
(ii) Describe briefly the condition in the eye responsible for the defect.
(iii) Redraw the figure by adding a suitable lens correcting the defect. Label the parts through which light-rays pass.
(iv) What special advantage do human beings derive in having both eyes facing forward?
Differentiate between:
Yellow spot and Blind spot.
State the Location:
Iris
Write scientific reason.
The movie cannot be enjoyed if seat of a viewer is too close to the screen in the cinema.
Eyes of the nocturnal birds have large cornea and a large pupil. How does this structure help them?
Match the following
| 1. | Conjunctiva | a. | Coloured part of eye |
| 2. | Cornea | b. | Photosensitive layer |
| 3. | Iris | c. | Refraction |
| 4. | Retina | d. | Protection |
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 neat, labeled diagram describe the structure of retina of eye.
Name the following:
The circular opening enclosed by iris.
Match the terms in column I with those in column II and write down the matching pairs.
| Column I | Column II | ||
| (i) | Conjunctiva | (a) | Viral infection |
| (ii) | Cornea | (b) | Ciliary body |
| (iii) | Choroid | (c) | Spiral-shaped |
| (iv) | Cochlea | (d) | Transparent epithelium |
| (v) | Conjunctivitis | (e) | Suspensory ligament |
| (f) | Contains melanin | ||
| (g) | Transparent but appears black |
Write the main functional activity of the following structure.
Choroid
