What Causes Sunburns?

The video discusses the importance of sunscreen in protecting against skin cancer caused by UV radiation. It explains how UV radiation is divided into UVA, UVB, and UVC, with UVA causing tanning and UVB leading to sunburn. The skin's defense mechanism involves melanocytes producing melanin to absorb UV radiation. If UVB damages DNA, cells may undergo apoptosis, leading to sunburn. Sunscreen helps by absorbing or reflecting UV radiation, reducing the risk of skin damage and cancer.

Describe the role of melanin in protecting the skin from UV radiation.

What are the potential consequences of excessive sun exposure without protection?