what type of a change is change in skin colour in hot summer
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When it’s too hot or dry outside, it becomes tanned
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Human skin comes in a wide variety of colours, ranging from shades of dark brown to almost white. Although an individual’s skin colour is influenced by numerous factors, the most significant is its content of a pigment called melanin. Melanin is also the pigment responsible for determining hair and eye colour.
Levels of melanin are primarily determined by genetics; individuals born to fair skinned parents will inherit their parent’s fair skin, as individuals born to dark skinned parents will inherit dark skin. The level of inherited skin pigmentation is referred to as constitutive pigmentation. A number of other factors determined at birth, for example the way a person’s body produces hormones and the way these hormones signal the cells which produce melanin, also influence skin colour. These factors inherited at birth, which cannot be changed, are referred to as intrinsic factors.
Extrinsic factors, things outside the body, also influence skin colour and provide acquired pigmentation. Exposure to ultraviolet (UV) radiation from the sun is the most important extrinsic factor. The sun emits UVA and UVB rays and the different types of UV rays have different effects on skin pigmentation. Exposure to UVA rays produces immediate pigmentation by influencing melanin which has already been produced and is waiting in the skin’s upper layers. Pigmentation which occurs several days after sun exposure is a result of new melanin being produced in response to UVB exposure. Other extrinsic factors which influence skin pigmentation and colour include DNA damage (often induced by UVB exposure) and age, as the way the body produces melanin changes as a person ages.
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HERE'S UR ANSWER
Human skin comes in a wide variety of colours, ranging from shades of dark brown to almost white. Although an individual’s skin colour is influenced by numerous factors, the most significant is its content of a pigment called melanin. Melanin is also the pigment responsible for determining hair and eye colour.
Levels of melanin are primarily determined by genetics; individuals born to fair skinned parents will inherit their parent’s fair skin, as individuals born to dark skinned parents will inherit dark skin. The level of inherited skin pigmentation is referred to as constitutive pigmentation. A number of other factors determined at birth, for example the way a person’s body produces hormones and the way these hormones signal the cells which produce melanin, also influence skin colour. These factors inherited at birth, which cannot be changed, are referred to as intrinsic factors.
Extrinsic factors, things outside the body, also influence skin colour and provide acquired pigmentation. Exposure to ultraviolet (UV) radiation from the sun is the most important extrinsic factor. The sun emits UVA and UVB rays and the different types of UV rays have different effects on skin pigmentation. Exposure to UVA rays produces immediate pigmentation by influencing melanin which has already been produced and is waiting in the skin’s upper layers. Pigmentation which occurs several days after sun exposure is a result of new melanin being produced in response to UVB exposure. Other extrinsic factors which influence skin pigmentation and colour include DNA damage (often induced by UVB exposure) and age, as the way the body produces melanin changes as a person ages.
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