Understanding Your Skin

What is the largest organ of the human body?

• Lungs

• Skin

• Liver

• Heart

Which layer of skin is responsible for synthesizing vitamin D?

• Not specified

• Hypodermis

• Dermis

• Epidermis

How often does the epidermis completely replace itself?

• Every 9-10 weeks

• Every 7-8 weeks

• Every 4-6 weeks

• Every 2-3 weeks

What is the primary function of melanocytes?

• Synthesizing melanin

• Producing sweat

• Regulating body temperature

• Protecting against UV radiation

Which cells are responsible for the sense of touch?

• Dendritic cells

• Keratinocytes

• Melanocytes

• Merkel cells

How many layers does the epidermis have in thick skin?

• Four

• Three

• Five

• Six

What happens when UV radiation damages the epidermis?

• It becomes waterproof

• Elastic fibers clump up, leading to leather-face condition

• It starts to produce more melanin

• It becomes more elastic

What is the main reason for applying sunscreen?

• To improve skin color

• To moisturize the skin

• To prevent skin cancer

• To cool down the body

What is the primary role of the dermis?

• Protecting against UV radiation

• Producing sweat and oils

• Housing nerve fibers and blood vessels

• Generating new skin cells

Which layer of skin contains most of the body's fat?

• Epidermis

• Stratum corneum

• Dermis

• Hypodermis