Cosmetology State Board Texas

What is the primary function of the epidermis in human skin?

• Protection against environmental damage

• Regulation of body temperature

• Production of vitamin D

• Storage of fat

Which vitamin is essential for the synthesis of collagen in the skin?

• Vitamin A

• Vitamin C

• Vitamin D

• Vitamin E

What is the pH range of healthy human skin?

• 3.5 to 4.5

• 4.5 to 5.5

• 5.5 to 6.5

• 6.5 to 7.5

Which layer of the skin contains the most collagen and elastin?

• Epidermis

• Dermis

• Hypodermis

• Stratum corneum

What is the role of melanocytes in the skin?

• Produce keratin

• Produce melanin

• Produce collagen

• Produce sebum

Which of the following is a common ingredient in chemical peels?

• Salicylic acid

• Hyaluronic acid

• Collagen

• Elastin

What is the main purpose of using a toner in skincare?

• Moisturize the skin

• Exfoliate dead skin cells

• Balance the skin's pH

• Provide sun protection

Which type of UV radiation is primarily responsible for sunburn?

• UVA

• UVB

• UVC

• Infrared

What is the function of sebaceous glands in the skin?

• Produce sweat

• Produce oil

• Produce melanin

• Produce collagen

Which of the following is a protein found in the skin that provides strength and elasticity?

• Keratin

• Collagen

• Elastin

• Melanin