Cosmetology Test Study Guide 2026

The matrix is the area where nail plate cells are formed and is the living part of the nail. It is located at the base of the nail, under the skin, and contains the blood vessels and nerves necessary for nail growth. Damage to the matrix can affect how the nail grows permanently.

Human hair wigs tolerate heat styling tools and chemical services such as coloring, which would permanently damage synthetic fibers.

Blood vessels and nerves reside in the nail bed, which is the living tissue underneath the nail plate. This area is rich in capillaries and nerve endings, providing nourishment to the growing nail plate and contributing to the nail's sensitivity. Damage to the nail bed can affect nail growth and health.

Cosmetology encompasses the art and science of beautifying the hair, skin, and nails. Specialties within this field include shampoo technicians, aestheticians (skin care specialists), and hair coloring. Shoe making, however, is a craft focused on footwear production and is entirely unrelated to personal grooming and beauty services, thus not a cosmetology specialty.

A rheostat is a variable resistor used to adjust or regulate the intensity of electrical current flowing through equipment during treatments.

When natural hair grows 2 or more inches from the attachment point, extensions shift away from the scalp, becoming visible and placing stress on the hair.