Cosmetology Exam Review Quiz

The stratum germinativum is responsible for the growth of the epidermis by continuously dividing to produce new cells that migrate towards the surface.

The papillary layer is the layer directly beneath the epidermis, providing structural support and nutrients. The dermis is located below the papillary layer, followed by the hypodermis and subcutis which are deeper layers of the skin.

The stratum granulosum layer is where cells undergo apoptosis, die, and are eventually shed from the skin surface to be replaced by new cells. The other listed layers do not serve this specific function in the skin's cell regeneration process.

The reticular layer is the deepest layer of the dermis and is responsible for supplying the skin with oxygen and nutrients. It also contains sweat and oil glands. The papillary layer is the outer layer of the dermis, the epidermis is the outermost layer of the skin, and the hypodermis is the layer of skin beneath the dermis.

The secretory coil is the part of the sweat gland that ends at the skin surface to form the sweat pore. The incorrect answers refer to different parts or types of sweat glands.

The nail bed is the portion of the living skin where the nail plate sits. The cuticle refers to the skin at the base of the nail, the nail matrix is the tissue beneath the nail that produces new cells, and the nail root is the portion of the nail beneath the skin.

Nail cells are formed in the matrix, which is the area of the nail bed where the nail grows from. The cuticle is the thin layer of skin at the base of the nail, the nail bed is the skin underneath the nail, and the tip is the outermost edge of the nail.

The lunula is the white, crescent-shaped area at the base of the fingernail. The cuticle is the strip of skin at the base of the nail plate. The matrix is the tissue underneath the nail that the lunula is a part of. The eponychium is the living skin at the base of the nail plate.

The cuticle is the dead colorless tissue attached to the nail plate, acting as a protective barrier for the nail.

The nail plate is constructed of 100 layers of nail cells composed mainly of keratin.

The matrix shape of the nail bed is responsible for the growth and shape of nails, while nail polish color, weather conditions, and water consumption do not directly impact these characteristics.

The correct answer is 1/10 inch per month, which is the average rate of nail growth in a normal adult. This rate may vary slightly among individuals, but 1/10 inch per month is widely accepted as the average rate.

Nails typically have a water content ranging from 15 to 25 percent due to their composition and exposure to environmental conditions.

In a mature hair strand, the hair shaft is the visible part above the scalp, while the hair root is the part hidden beneath the skin. The other options do not accurately represent the main parts of a mature hair strand.

A follicle is a structure from which hair grows, and it is located in the skin or scalp. It acts as a pocket or tube that contains the hair root. While pores, ducts, and glands are also important in the skin, they do not specifically refer to the structure that houses the hair root.

The correct answer is 'dermal papilla' because it is the structure at the base of the hair follicle that contains blood vessels that supply nutrients to the hair bulb, which is responsible for hair growth.

The hair bulb is the part of the hair follicle located at the base of the hair strand where the hair root grows. The hair shaft is the visible part of the hair above the skin, the hair follicle is the structure from which the hair grows, and the hair cuticle is the outermost part of the hair that protects it.

The dermal papilla is a structure at the base of the hair follicle that plays a crucial role in hair growth and being the main source of nutrients for the hair bulb. The hair cortex, follicular sheath, and sebaceous gland are important structures that support the hair follicle but are not specifically situated at its base.

The medulla of the hair is composed of round cells, giving it a distinctive appearance when viewed under a microscope.

The cortex layer is the correct answer as it is the fibrous protein core formed by elongated cells that contain melanin pigment in the skin.

Hair is composed of a protein called keratin that grows from cells within the hair follicle. The other options do not play a direct role in the growth or composition of hair.

Peptide bonds are the covalent bonds that link amino acids in a protein chain. Ionic bonds are formed between ions with opposite charges, covalent bonds involve the sharing of electrons, and hydrogen bonds are weaker attractions between hydrogen atoms and other electronegative atoms.

A peptide bond is a type of covalent bond that forms between the carboxyl group of one amino acid and the amino group of another amino acid in a polypeptide chain.

Salt bonds are weak bonds that can be disrupted by solutions with extreme pH levels, such as strong alkaline or acidic solutions.

Hydrogen chemical hair relaxers break disulfide bonds in the hair, and during rinsing, they are converted to lanthionine bonds. This chemical process helps in straightening the hair by altering its structure.

Extremely curly hair is characterized by long twisted spirals, not short and straight, thick and wavy, or fine and silky textures.

Extremely curly hair may break or knot easily due to its low elasticity, making it prone to damage and breakage.

Normalizing shampoos are specifically designed to help balance oil production on the scalp and hair. Moisturizing shampoos may exacerbate oily scalp issues, anti-dandruff shampoos target a different problem, and clarifying shampoos are meant for deep cleansing and may strip the scalp of its natural oils.

The correct answer is one inch per month, which is the average growth rate of healthy scalp hair. It may vary slightly from person to person, but generally, hair grows at this rate.

Metals, minerals, water and air are all examples of inorganic substances because they do not contain carbon-hydrogen bonds and are not derived from living organisms.