Human Variation and Race

Human Variation and Race 

High Levels of Solar Radiation

1. High Levels of Solar Radiation have been prove to have a negative impact on humans. The over exposition to this can have terrible effects in the human skin. One of the things that often have a terrible effect in the skin is the exposure to UVA rays. The ultraviolet radiation rays have the capacity to penetrate the many layers of the human skin. The over exposure to the UVA rays can create a lack of Vitamin B in the body, which later on would contribute to miscarriages, anemia or newborns with defects. The high levels of solar radiation can also affect Melanin, melanin is the component that controls the skin color. When this one is overly exposed to the sun it can created changes to the DNA. Cancer can be a result of such a changes. 

2. Short Terms: Sadly for short term adaptation their is really nothing the human body can do. We have poorly indication of when the body is been overly exposed to the sun. The only signs we can get are the sweet and the sensation of flush. 

Facultative: Tanning can be a facultative caused by the high levels of sola radiation. When we tan we tent to take a great amount of time to go back to our normal skin color. This is because when we expose our skin to the sun the UVA rays cause the human phenotypes to change making them darker. 

Developmental: The development in skin are found in the different type of environments humans are exposed to. Skin color is one of them. Depending in environment they are exposed to their skin color would change. People who are often exposed to the sun have darker skin, while people who are hardly ever exposed have lighter skin. The darker is skin is necessary for people who are born with it, since it helps them protect themselves from the UVA rays.

Cultural: There are plenty ways that humans have created ways to protect their skin from the solar rays. Often they wear long sleeves, protect themselves under an umbrella or hats. But the most common one is the use of sun block. Sun block helps to minimize the amount of rays that the skin is exposed to creating a better adaptation for humans to enjoy the outdoors. 

3. Studying the human variation can be really informative. We can learn what are the positive and the negative causes to the over exposure to the high levels of solar radiation. And we can also see how humans throughout the time have come to accustomed to it and how they now are trying to adapt to this. We can also learn the explanation of the different skin colors and their proposes. 

4. The term race is often used when someone is referring to someone’s skin color. Although if people pays close attention to the humans adaptation to their environment and their exposure to the solar radiation they could argue that race is not about skin color but their region; since the skin color has been adjusted to their environment in order for the individuals to survive.