What is an important function of melanin in the skin ?

The correct answer is Absorb harmful radiation.

Explanation:

• Melanin is a pigment produced by cells known as melanocytes, which are found in the skin, hair, and eyes of humans and other animals.
• Its primary function in the skin is to provide protection against damage caused by ultraviolet (UV) radiation from the sun.
• Melanin absorbs UV radiation, reducing its penetration into the deeper layers of the skin where it could damage DNA and potentially lead to skin cancer.
• Melanin acts as a natural sunscreen by absorbing and dissipating harmful UV radiation.
• People with higher melanin levels, such as those with darker skin, have better natural protection against UV radiation compared to individuals with lighter skin.
• However, excessive exposure to UV rays can still overwhelm the protective capacity of melanin, making sunscreen and protective clothing important for all skin types.

Other Options:

• Cause the skin to be cooler:
  • Melanin does not regulate skin temperature. The temperature of the skin is controlled by factors such as blood flow, sweat production, and environmental conditions.
• Increase the amount of blood flow:
  • Blood flow in the skin is regulated by the circulatory system and vasodilation or vasoconstriction of blood vessels, not by melanin.
• 3) Strengthen the skin:
  • Collagen and elastin are the key proteins that provide strength and elasticity to the skin.