Melanin protect from
Melanin protect from
- U.V. rays
- Visible rays
- Infrared rays
- X-rays
The Correct Option is A
Solution and Explanation
The correct option is (A) : U.V. rays
Melanocyte Stimulating Hormone (MSH), which affects the skin's melanocytes, is released by the pituitary gland's intermediate lobe. These cells create melanin, a coloured pigment that reflects UV-A light away from the skin. This stops the UV rays from damaging the DNA of the body's other sensitive cells or from penetrating those cells in the first place. This is the reason that when exposed to strong sunshine, the body tans. It serves as a defence mechanism.
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Concepts Used:
Environmental Issues
Environmental issues refer to problems that arise from human activities that negatively impact the natural environment. These issues have far-reaching consequences on the earth and its inhabitants, including plants, animals, and humans.
Some of the major environmental issues include climate change, pollution, deforestation, and loss of biodiversity. Climate change is caused by the accumulation of greenhouse gases in the atmosphere, leading to global warming and changes in weather patterns. Pollution is the release of harmful substances into the environment, such as air pollution from vehicle exhausts and industrial emissions or water pollution from oil spills and agricultural runoff.
Deforestation is the clearing of forests for human activities such as agriculture and logging, leading to habitat destruction and loss of biodiversity. Biodiversity is the variety of plant and animal species in an ecosystem, and its loss can lead to ecological imbalances, reduced food security, and the spread of diseases.
Other environmental issues include land degradation, resource depletion, and waste management. Land degradation is the deterioration of soil quality due to activities such as overgrazing, overuse of fertilizers, and deforestation. Resource depletion refers to the depletion of natural resources such as water, fossil fuels, and minerals. Waste management refers to the proper disposal and treatment of waste, which can cause health and environmental problems if not handled correctly.
Overall, environmental issues require collective action and effective policies to reduce their impact and preserve the natural world for future generations.