BIOLOGY
VITAMINS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Person gets tired easily.
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Swelling of gland in neck.
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Bleeding of gums and swelling of joints.
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Person is not able to see in dim light.
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Detailed explanation-1: -Night blindness is one of the first signs of vitamin A deficiency. In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea.
Detailed explanation-2: -Vitamin A plays an important role in your vision. To see the full spectrum of light, your eye needs to produce certain pigments for your retina to work properly. Vitamin A deficiency stops the production of these pigments, leading to night blindness.
Detailed explanation-3: -Vitamin B2, B3, and B6 deficiencies are associated with dry eyes and eye infections in the front of the eye. Vitamin B12 deficiency is associated with pernicious anemia and may cause retinal bleeding, destruction of nerve tissue, and lead to permanent vision loss.
Detailed explanation-4: -Some of the first signs of vitamin A deficiency are dry eyes and night blindness.
Detailed explanation-5: -A retinal disorder causes night blindness. As the vitamin A deficiency worsens, the whites of your eyes and your corneas can become dry and you aren’t able to produce tears (xerophthalmia).