Which type of cells play the most important role in preventing skin cancer?

• A. Keratinocytes
• B. Melanocytes
• C. Dendritic cells
• D. Tactile epithelial cells

Answer: (B)

Verified step by step guidance

1. Begin by understanding the function of each cell type mentioned in the problem. This will help you determine which cell plays a crucial role in preventing skin cancer.
2. Keratinocytes are the most abundant cells in the epidermis and are primarily responsible for forming a protective barrier against environmental damage, but they are not directly involved in preventing skin cancer.
3. Melanocytes are specialized cells located in the basal layer of the epidermis. They produce melanin, a pigment that absorbs ultraviolet (UV) radiation, thereby protecting skin cells from DNA damage that can lead to cancer.
4. Dendritic cells, also known as Langerhans cells, are part of the immune system and help detect and fight off pathogens, but their role is more related to immune response rather than direct prevention of skin cancer.
5. Tactile epithelial cells, or Merkel cells, are involved in the sensation of touch and do not play a significant role in preventing skin cancer. Therefore, melanocytes are the cells that play the most important role in preventing skin cancer by producing melanin to protect against UV radiation.