Final Exam: Lab Stuff Flashcards Preview

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Flashcards in Final Exam: Lab Stuff Deck (16):
1

What happens to dark skin under high levels of UV?

Less sunburn and skin cancer AND reduced loss of folic acid due to many melanocytes

UV + High cholesterol --> Vitamin D

2

The _____ your skin, the less UV light you are able to absorb

Darker

3

UV light destroys...

Folic acid

4

_____ can be converted into vitamin D

Cholesterol

5

What happens to dark skin under low levels of UV?

High cholesterol + Vitamin D deficiency

6

What happens to light skin under low levels of UV?

Minimal damage to folic acid
Lower cholesterol + UV --> Vitamin D

7

What happens to light skin under high levels of UV?

Few melanocytes cause greater loss of folic acid
Sunburn and skin cancer

8

Folic acid - 5 benefits

Prevents anemia
Cell division
Important for normal heart function and immune system
Nervous system
DNA replication

9

Vitamin D is vital and made in your skin - 6 Benefits

Healthy bone growth
Helps absorb Ca and P
Helps with blood clotting
Aids in nervous system function
Important for normal heart and immune system function
Prevents osteoporosis

10

How do we get vitamin D?

Food supplement (especially milk)

Naturally (UVb light + cholesterol + skin = 4 forms of Vitamin D - only 2 found in food)

11

Qhite skin makes vitamin D ____ due to UV rays

More easily

12

Dark skin is not very good at making _____. Therefore more _____ is needed to offset dark skin.

Vitamin D; cholesterol

13

What are advantages of dark skin?

Prevents sunburn and skin cancer
Protects folic acid from being destroyed by UV light

14

What are disadvantages of dark skin?

More difficult to make Vitamind D
Associated with high levels of cholesterol

15

What are advantages of light skin?

Easier to make Vitamin D
Lower levels of cholesterol

16

What are disadvantages of light skin?

More UV light breaks down folic acid
More sunburn and skin cancer when exposed to UV light