Utah Esthetician State Board Practice Exam

In which layer of the skin can melanocytes be predominantly found?

1. Stratum corneum

2. Stratum granulosum

3. Basal layer

4. Stratum lucidum

The correct answer is: Basal layer

Melanocytes are specialized cells responsible for producing melanin, the pigment that gives skin its color and provides some protection against UV radiation. These cells are predominantly located in the basal layer of the epidermis, also known as the stratum basale. This layer is the deepest part of the epidermis, where the skin cells begin to proliferate. In the basal layer, melanocytes are situated amongst keratinocytes and are connected to them via long dendritic processes, allowing for the transfer of melanin to these surrounding cells. This melanin is crucial for absorbing harmful UV rays, effectively protecting deeper layers of the skin from damage. The other layers mentioned, such as the stratum corneum (the outermost layer), the stratum granulosum, and the stratum lucidum, do not house melanocytes as they are primarily composed of keratinized cells and do not have the functionality of pigment production. In summary, the correct answer highlights the primary location of melanocytes within the skin, emphasizing their role in both pigmentation and UV protection.