PATHOLOGY MCQ
SKIN
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Freckles & Moles
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Pallor or Blanching
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Jaundice
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Low Melanin Production
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Tanning
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Detailed explanation-1: -The outer layer of the skin has cells that contain the pigment melanin. Melanin protects skin from the sun’s ultraviolet rays. These can burn the skin and reduce its elasticity, leading to premature aging. People tan because sunlight causes the skin to produce more melanin and darken.
Detailed explanation-2: -Melanin protects the skin by shielding it from the sun. When the skin is exposed to the sun, melanin production increases, which is what produces a tan. It’s the body’s natural defense mechanism against sunburn.
Detailed explanation-3: -Ultraviolet Radiation as a Regulator of Melanogenesis A major extrinsic regulator of melanogenesis is ultraviolet radiation (UVR), including UVA and UVB light. This is the main stimulus for melanin production, leading to induced pigmentation of the skin, or ‘tanning’.