EPITHELIUM CONNECTIVE TISSUE SKIN
INTEGUMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A
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E
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K
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D
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Detailed explanation-1: -The skin is responsible for producing vitamin D. During exposure to sunlight, ultraviolet radiation penetrates into the epidermis and photolyzes provitamin D3 to previtamin D3.
Detailed explanation-2: -Vitamin D Production D3 (cholecalciferol) is produced from 7-dehydrocholesterol (7-DHC) through a two-step process in which the B ring is broken by UV light (spectrum 280–320 UVB) radiation from the sun, forming pre-D3 that isomerizes to D3 in a thermo-sensitive but noncatalytic process.
Detailed explanation-3: -Often called the ‘sunshine vitamin’, vitamin D plays an integral role in skin protection and rejuvenation. In its active form as calcitriol, vitamin D contributes to skin cell growth, repair, and metabolism. It enhances the skin’s immune system and helps to destroy free radicals that can cause premature ageing.