HAP4.3 Skin Color

Your skin color is determined by your

• Genetic Inheritance 
• Environmental factors
• Culture
• None of the above

What is melanin?

• A protein pigment that absorbs light

• A protein that is waterproof and tough

• A cell found in the epidermis

• A vitamin that helps you sleep

If a person lives in an environment with a LOW UV index what kind of skin color would be the best adapted?

• Darker skin tones to increase production of Vitamin D Synthesis

• Darker skin tones to protect DNA and Folate

• Lighter skin tones to increase production of Vitamin D

• Lighter skin tones to protect DNA and Folate

How does melanin protect DNA from the damaging effects of Ultraviolet light?

• It relies on folate

• It doesn't you must use sunscreen

• it activates vitamin D3 production which takes care of that

• Forms a protective cap over the nucleus of skin cells

What is Pheomelanin?

• A type of melanin that produces dark brown/black skin

• A type of melanin that produces reddish/yellow pigment

• An enzyme that controls skin color

• An enzyme that produces melanin

The skin is...

• An organ

• A thing

• A substance

In people who eat large amounts of foods rich in this, the skin tends to take on a yellow-orange cast because this is deposited in the stratum corneum.

• Bruising

• Carotene

• Hemoglobin

• Erythema

• Cyanosis

It’s crimson color causes fair-skinned people to have a rosy glow through their epidermis.

• Bruising

• Carotene

• Hemoglobin

• Erythema

• Cyanosis

When the blood is poorly oxygenated, the epidermis of light-skinned people appears blue or gray. In dark-skinned people, it is apparent in their nail beds.

• Bruising

• Carotene

• Hemoglobin

• Erythema

• Cyanosis

An abnormal yellowing of the skin that usually signifies a liver disorder in which excess bile pigments accumulate in the blood and deposit in the tissues.

• Freckles & Moles

• Pallor or Blanching

• Jaundice

• Low Melanin Production

• Tanning