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प्रश्न
Choose the correct answer.
Rods are receptor of ______________
विकल्प
twilight vision
colour vision
sound wave
odour
उत्तर
Rods are receptor of twilight vision
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संबंधित प्रश्न
Night birds have ______ cones than rods in their eyes.
Draw a labelled sketch of the human eye.
What job does the pupil of the eye do?
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....................
How does the convex eye-lens differ from the ordinary convex lens made of glass?
To focus the image of a nearby object on the retina of an eye:
(a) the distance between eye-lens and retina is increased
(b) the distance between eye-lens and retina is decreased
(c) the thickness of eye-lens is decreased
(d) the thickness of eye-lens is increased
Suggest how your irises help to protect the retinas of your eyes from damage by bright light.
The animal which does not have eyes that look sideways is:
(a) Horse
(b) Chicken
(c) Lion
(d) Fish
The animals called predators have:
(a) both the eyes on the sides
(b) one eye on the side and one at the front
(c) one eye on the front and one at the back
(d) both the eyes at the front
Mention, where in living organism is the following located and state their main function:
Fovea centralis
Mention if the following statement is true (T) or false (F) Give reason.
Blind spot is called so because no image is formed on it.
State the main functions of the following:
Seminal Vesicles
Define the following:
Power of accommodation
Give the main function of the following:
Lachrymal glands
Name the following:
The most sensitive region of the retina.
Complete the paragraph by choosing the right options given below.
(minimum, near point, 25 cm, farthest, farthest distance, far point)
The _______ distance of an object from a normal eye, at which it is clearly visible without stress on the eye, is called the minimum distance of distinct vision. The position of the object at this distance is called the _______ of the eye, for a normal human eye, the near point is at _______. The _______ distance of an object from a human eye, at which it is clearly visible without stress on the eye is called _______ of distinct vision. The position of the object at this distance is called the _______ of the eye.
What kind of lens is there in our eyes? Where does it form the image of an object?
Match the following
| 1. | Conjunctiva | a. | Coloured part of eye |
| 2. | Cornea | b. | Photosensitive layer |
| 3. | Iris | c. | Refraction |
| 4. | Retina | d. | Protection |
Which of the following is responsible for the adjustment of the size of pupil?
Write the main functional activity of the following structure.
Choroid
