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Home  >>  JEEMAIN and AIPMT  >>  Biology  >>  Human Physiology
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Regarding eye - choose the incorrect statement :


( A ) In front of the lens, the aperture surrounded by the iris, called the pupil, whose diameter is regulated by iris.
( B ) Photoreceptor cells rods and cones contain the light-sensitive proteins photopigments
( C ) The inner layer is the retina and it contains three layers of cells – from outside to inside – ganglion cells, bipolar cells and photoreceptor cells.
( D ) The daylight (photopic) vision and colour vision are functions of cones and the twilight (scotopic) vision is the function of the rods.
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1 Answer

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(C) is the right answer.

In front of the lens, the aperture surrounded by the iris is called the pupil. The diameter of the pupil is regulated by the muscle fibres of iris. The inner layer is the retina and it contains three layers of cells – from inside to outside – ganglion cells, bipolar cells and photoreceptor cells. There are two types of photoreceptor cells, namely, rods and cones. These cells contain the light-sensitive proteins called the photopigments. The daylight (photopic) vision and colour vision are functions of cones and the twilight (scotopic) vision is the function of the rods. The rods contain a purplish-red protein called the rhodopsin or visual purple, which contains a derivative of Vitamin A.
answered Apr 3, 2014 by pady_1
 
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