Melanin Review

What does this image represent?

• weather conditions

• amount of ultraviolet light intensity

• skin color

• altitude

Traveling away from the equator, what happens in general to the amount of UV intensity?

• The intensity decreases.

• The intensity increases

• The intensity stays the same.

• It is impossible to predict.

Who would be most at risk of developing rickets, a bone disease caused by insufficient calcium absorption?

• Children born to mothers with dark skin living far from the equator.

• Adults with dark skin who live close to the equator.

• Children born to mothers with light skin, living close to the equator.

• Adults with light skin who live close to the equator.

• Anyone who eats a diet that includes a lot of fish

Your skin color is determined by your

• Genetic Inheritance 

• Environmental factors

• Culture

• None of the above

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is melanin?

• A protein pigment that absorbs and reflects light

• A protein that is waterproof and tough

• A cell found in the epidermis

• A vitamin that helps you sleep

Tags

NGSS.HS-LS3-1

What kind of cells create melanin?

• Keratinocyte

• Melanocyte

• Leukocyte

• Erythrocyte

Different tones of human skin color evolved 

• in response to varying levels of UV radiation in the environment

• Randomly and for no reason at all

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

If a person lives in an environment with low radiation 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

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-5

How does melanin protect cell's 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

The graph in Figure 2 summarizes the age at which people are diagnosed with melanoma, the most serious form of skin cancer. When would you see the most likely chance of developing skin cancer?

• 35-44

• 45-54

• 55-64

• 65-74