EASY
Earn 100

Night blindness is caused by the defect of cones.

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Important Questions on Neural Control and Coordination

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The transparent lens in the human eye is held in its place by
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In the mammalian eye, the 'fovea' is the the center of the visual field, where:
MEDIUM
Draw a labelled diagram of the internal ear and explain the mechanism of hearing.
MEDIUM

Match the following columns and select the correct option:-

Column-I column-II
(a) Rods and cones (i) Absence of photoreceptor cells
(b) Blind spot (ii) Cones are densely packed
(c) Fovea (iii) Photoreceptor cells
(d) Iris (iv) Visible coloured portion of the eye
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Which statement is CORRECT regarding blind spot in human eye?

It ___________.

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A gymnast is able to balance his body upside down even in the total darkness because of:
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When one goes from a brightly lit area to a dimly lit room our eyes adjusts slowly, thereby regaining the clarity of vision. Which ONE of the following explains this process?
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Name the point on Retina where both rods and cones are absent.
HARD
Draw a labelled diagram of the internal structure of the human ear.
HARD
Which of the following statement is correct?
(i) The rods contain a purplish-red protein called the rhodopsin.
(ii) The photopigments are embedded in the membrane discs of the inner segment.
(iii) Retinal is a derivative of vitamin A.
(iv) Light induces dissociation of the retinal from opsin resulting in changes in the structure of the opsin.
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Which eye pigment helps animals to see in dim light? 
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How do Rods and Cones of human Dye differ from each other chemically and functionally ?
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The photosensitive compound in the human eye is made up of:
MEDIUM
Which one of the following statements is not correct?