Electrolysis Practice Exam

What is the name of the outer layer of skin?

1. Dermis

2. Epidermis

3. Hypodermis

4. Follicle

The correct answer is: Epidermis

The outer layer of skin is called the epidermis. This layer serves as the first line of defense against environmental factors such as bacteria, UV radiation, and chemical exposure, and it plays a critical role in protecting the underlying layers of skin. The epidermis is made up of several layers of cells, primarily keratinocytes, which produce keratin, a protein that helps waterproof and protect the skin. In contrast, the dermis lies beneath the epidermis and contains connective tissues, blood vessels, and nerve endings. The hypodermis is the layer below the dermis, primarily composed of fat and connective tissue, serving as insulation and energy storage. A follicle typically refers to the structure from which hair grows and is associated with the dermal layer rather than being a layer of skin itself.