How Skin Color Works

The video explores the role of genetics and sun exposure in skin pigment, detailing the layers of the skin, particularly the epidermis, where pigment is formed. It explains the function of melanocytes and how UV exposure affects melanin production, influencing skin color and protection against UV damage. The video also discusses the differences in skin thickness on the palms and soles, and the impact of sun damage, including the formation of freckles.

Which factor is NOT mentioned as influencing skin pigmentation?

• Skin layer thickness

• Diet

• Genetics

• Sun exposure

What is the primary function of the dermis layer?

• Providing tensile strength

• Protecting against UV rays

• Energy storage

• Producing melanin

Where is the majority of tattoo ink deposited?

• Dermis

• Epidermis

• Stratum corneum

• Hypodermis

What type of cells are primarily responsible for producing melanin?

• Melanocytes

• Fibroblasts

• Adipocytes

• Keratinocytes

How does UV exposure affect melanin production?

• Has no effect on melanin

• Decreases melanin production

• Increases melanin production

• Destroys melanin

Why do people with darker skin have a lower risk of skin cancer?

• They have fewer melanocytes

• Their melanocytes produce more melanin

• Their skin is thicker

• They have more keratinocytes

What is the stratum lucidum primarily associated with?

• Melanin production

• Blood supply to the skin

• Presence in palms and soles

• Thickness of the epidermis

What is the main reason for the difference in pigmentation on the palms and soles?

• Presence of stratum lucidum

• Increased sun exposure

• Thinner epidermis

• Higher number of melanocytes

What type of freckle is associated with sun damage?

• Aphelides

• Lentigines

• Melanocytes

• Keratinocytes

What is the recommended SPF level for sun protection mentioned in the video?

• SPF 30

• SPF 50

• SPF 100

• SPF 15