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Free download in PDF Vision and Hearing Physiology Short Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
41
Duration of temporary blindness on going suddenly from brightness to dark and vice-versa in our eyes is for:
[A]
1-2 seconds
[B]
2-5 seconds
[C]
5-10 seconds
[D]
10-30 seconds
42
When the near objects are to be focused by our eye then the:
[A]
Ciliary muscles are relaxed and lens is flattened to have maximum focal length
[B]
Ciliary muscles are contracted and lens becomes maximum convex
[C]
Ciliary muscles are relaxed and the lens becomes maximum convex
[D]
Ciliary muscles are contracted and the lens becomes flattened
Answer: Ciliary muscles are contracted and lens becomes maximum convex
43
At rest the mammalian eye is focused for distant objects by:
[A]
Relaxation of ciliary muscles which flattens the lens and enables it to have maximum focal length
[B]
Contraction of ciliary muscles which makes lens maximum convex
[C]
Relaxation of ciliary muscles which makes the lens maximum convex
[D]
Contraction of ciliary muscles that makes lens flattened
Answer: Relaxation of ciliary muscles which flattens the lens and enables it to have maximum focal length
44
Mammalian eyes have remarkable power of accommodation by:
[A]
Having well developed protractor lentis muscles
[B]
Capability of changing the size of eye ball
[C]
Capability to change the convexity of lens which changes its focal length
[D]
None of these
Answer: Capability to change the convexity of lens which changes its focal length
45
A slight accommodation in frog's eyes can be brought about by:
[A]
Protractor lentis muscles
[B]
Retractor lentis muscles
[C]
Ciliary muscles
[D]
None of these
Answer: Protractor lentis muscles
46
Frog's eyes are capable of:
[A]
Maximum accommodation
[B]
Slight accommodation
[C]
No accommodation
[D]
None of these
Answer: Slight accommodation
47
In water the frogs are:
[A]
Hypermetropic
[B]
Myopic
[C]
Normal sighted
[D]
None of these
48
On land frogs are:
[A]
Hypermetropic
[B]
Myopic
[C]
Normal sighted
[D]
None of these
49
The nerve centre for sight is located in:
[A]
Thalamus
[B]
Cerebral cortex
[C]
Both (a) & (b)
[D]
None of these
50
Least distance vision for a person of hypermetropia is:
[A]
25 cms
[B]
Less than 25 cms
[C]
More than 25 cms
[D]
Infinity
51
With the change in the intensity of light from one to one hundred the response of our eye will be increased by:
[A]
0.01
[B]
2
[C]
10
[D]
100
52
Night blindness is caused by:
[A]
Hypermetropia
[B]
Myopia
[C]
Defective cornea
[D]
Deficiency of rhodopsin
Answer: Deficiency of rhodopsin
53
During night the slow intensity of light is detected by:
[A]
Cones
[B]
Rods
[C]
Both (a) & (b)
[D]
Crystalline lens
54
Which of the following organs is involved to help us feel the earthquake:
[A]
Eye
[B]
Skin of sole
[C]
Ear
[D]
None of these
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