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Biology 10 Chapte 12 - Coordination and Control - 15
1.
What is the function of vitreous humour?
a) Suspends delicate lens
b) Maintains eye shape
c) Carries impulses to the brain
d) Both b and c
2.
Light from object enters eye and..............?
a) Is reflected
b) Is diffracted
c) Is refracted
d) Goes straight
3.
What do lens do with the light?
a) Diffracts the light
b) Disperses the light
c) None of the above
d) Focuses the light
4.
Which of the following generate nerve impulses on receiving light rays?
a) Both b and c
b) Rods
c) Fovea
d) Cones
5.
What is the pigment present in rods called?
a) Tapetum
b) Rhodopsin
c) Iodopsin
d) Fovea
6.
From which component, body synthesizes rhodopsin?
a) Protein
b) Fats
c) Vitamin
d) Lipids
7.
From which vitamin, body synthesizes rhodopsin?
a) Vitamin C
b) Vitamin E
c) Vitamin D
d) Vitamin A
8.
What does the deficiency of vitamin A causes?
a) All are correct
b) Eye blindness
c) Night blindness
d) Colour blindness
9.
What is the pigment present in cones called?
a) Rhodopsin
b) Tapetum
c) Iodopsin
d) Fovea
10.
How many types of cones are there?
a) Five
b) Four
c) Three
d) Six
11.
How many primary colours are there?
a) Three
b) Five
c) Six
d) Four
12.
What are the primary colours?
a) All are correct
b) Blue
c) Green
d) Red
13.
The inability to distinguish different colours is called.................?
a) Night blindness
b) Eye blindness
c) Colour blindness
d) All are correct
14.
What is caused by the elongation of eyeball?
a) Short sight
b) Near sight
c) Myopia
d) All are correct+
15.
A person with myopia can’t see .................objects clearly?
a) None of the above
b) Near
c) Distant+
d) Close
16.
Where is the image of distant object formed, in case of myopia?
a) Above the retina
b) Behind retina
c) Not formed
d) In front of retina+
17.
Which lens can be used to rectify myopia?
a) Concavo-convex lens
b) Concave lens+
c) Convex lens
d) Plano-convex lens
18.
What is caused by the shortening of eyeball?
a) Hypermetropia
b) Far sight
c) Hypermetropia
d) All are correct+
19.
A person with hypermetropia can’t see .................objects clearly?
a) Distan
b) Near+
c) Far
d) None of the above
20.
Where is the image of near object formed, in case of hypermetropia?
a) In front of retina
b) Behind retina+
c) Not formed
d) Above the retina
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