Michigan Esthetician State Board Practice Exam

What is the name of the basal layer of the epidermis?

1. Stratum corneum

2. Stratum lucidum

3. Stratum granulosum

4. Stratum germinativum

The correct answer is: Stratum germinativum

The basal layer of the epidermis is known as the stratum germinativum. This layer is crucial because it is where new skin cells are generated through the process of mitosis. The cells produced here will gradually move up to the outer layers of the epidermis as they mature and die, eventually forming the protective barrier that is visible to us. The stratum germinativum is composed of living cells that are constantly dividing, which makes it essential for the regeneration of the skin. Additionally, this layer contains melanocytes, which produce melanin and contribute to skin color and protection against UV radiation. The other layers mentioned—stratum corneum, stratum lucidum, and stratum granulosum—are situated above the stratum germinativum in the epidermis. The stratum corneum is the outermost layer, composed of dead, flattened keratinized cells that provide a protective barrier. The stratum lucidum is found only in certain areas like the palms of the hands and soles of the feet and is a thin, clear layer that adds an additional level of protection. The stratum granulosum contains cells that have started to die and lose their nuclei, and it plays a role in the