Utah Master Esthetician Practice Exam

Which layer of the skin is primarily affected by microdermabrasion?

1. Stratum corneum

2. Stratum granulosum

3. Dermis

4. Hypodermis

The correct answer is: Stratum corneum

Microdermabrasion primarily targets the stratum corneum, the outermost layer of the skin. This layer is composed of dead skin cells that provide a protective barrier for underlying tissues. The process of microdermabrasion involves the physical exfoliation of this layer, resulting in the removal of dead skin cells and promoting cellular turnover. By effectively sanding away the stratum corneum, microdermabrasion enhances the texture and appearance of the skin, improves radiance, and can help with conditions such as fine lines, sun damage, and uneven pigmentation. The treatment encourages collagen production and allows for better penetration of topical products, leading to more effective skincare. The other layers of the skin, such as the stratum granulosum, dermis, and hypodermis, are not primarily impacted during microdermabrasion. The stratum granulosum is located beneath the stratum corneum and has a different role in skin function and structure. Meanwhile, the dermis contains blood vessels, nerves, and connective tissue, while the hypodermis, or subcutaneous layer, serves as insulation and cushioning for the body. These deeper layers are generally not directly affected by the microdermabrasion process.