Vision and Hearing Physiology Quiz | Vision and Hearing Physiology Short Questions and Answers

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Questions
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

Answer: 1-2 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
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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

Answer: Hypermetropic
48 On land frogs are:
A Hypermetropic
B Myopic
C Normal sighted
D None of these

Answer: Myopic
49 The nerve centre for sight is located in:
A Thalamus
B Cerebral cortex
C Both (a) & (b)
D None of these

Answer: Both (a) & (b)
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

Answer: 25 cms
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

Answer: 0.01
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

Answer: 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

Answer: Ear

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