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प्रश्न
Differentiate between members of the following pair with reference to what is asked in bracket.
Rod and cone cells (pigment contained)
उत्तर
Rod cells contain rhodopsin whereas the cone cells contain iodopsin.
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संबंधित प्रश्न
Draw a labelled sketch of the human eye.
Explain why the image distance in the eye does not change when we change the distance of an object from the eye?
The optical prescription for a pair of spectacles is :
Right eye : −3.50 D
Left eye : −4.00 D
Are these lenses thinner at the middle or at the edges?
Where is the image formed in a human eye?
Fill in the following blank with suitable word:
The iris controls the amount of................entering the eye.
What changes take place in the shape of eye-lens:
when the eye is focused on a distant object?
What are rods and cones in the retina of an eye? Why is our night vision relatively poor compared to the night vision of an owl?
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
Name two animals having eyes:
at the front of the head.
The animals of prey have:
(a) two eyes at the front
(b) two eyes at the back
(c) two eyes on the sides
(d) one eye at the front and one on the side
State the function of each of the following parts of the human eye:
(i) Cornea
(ii) Iris
(iii) Pupil
(iv) Retina
Millions of people of the developing countries are suffering from corneal blindness. This disease can be cured by replacing the defective cornea with the cornea of a donated eye. Your school has organised a campaign in the school and its neighbourhood in order to create awareness about this fact and motivate people to donate their eyes after death. How can you along with your classmates contribute in this noble cause? State the objectives of organising such campaigns in schools.
Name the following:
The region in the eye where the rods and cones are located.
Name the following:
Yellow spot and ciliary muscles are found in.
State the Function:
Cornea
State the Function:
Choroid coat in the eye
State the Function:
Visual purple
Write the name.
The fleshy screen behind cornea.
Which of the following is responsible for the adjustment of the size of pupil?
With reference to human eye answer the question that follow:
Name the part of the eye associated with keeping the lens moist and protecting it from physical shock.
