Cosmetology Nocti Exam

What is the primary function of melanin in the skin?

• To protect against UV radiation

• To provide elasticity

• To regulate temperature

• To produce vitamin D

Which layer of the skin contains the most collagen?

• Epidermis

• Dermis

• Hypodermis

• Stratum corneum

What is the pH level of healthy skin?

• 4.5 to 5.5

• 6.5 to 7.5

• 7.5 to 8.5

• 3.5 to 4.5

Which vitamin is essential for collagen synthesis?

• Vitamin A

• Vitamin C

• Vitamin D

• Vitamin E

What is the role of sebaceous glands in the skin?

• To produce sweat

• To produce sebum

• To produce melanin

• To produce keratin

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

• Salicylic acid

• Hyaluronic acid

• Collagen

• Elastin

What is the main component of the stratum corneum?

• Keratin

• Collagen

• Elastin

• Melanin

Which type of UV radiation is primarily responsible for sunburn?

• UVA

• UVB

• UVC

• Infrared

What is the function of the arrector pili muscle?

• To produce sweat

• To cause hair to stand up

• To produce sebum

• To produce melanin

Tags

NGSS.HS-LS1-3

Which of the following is a method for measuring skin hydration?

• Corneometry

• Spectrophotometry

• Chromatography

• Electrophoresis