Final Exam: Lab Stuff Flashcards
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
The _____ your skin, the less UV light you are able to absorb
Darker
UV light destroys…
Folic acid
_____ can be converted into vitamin D
Cholesterol
What happens to dark skin under low levels of UV?
High cholesterol + Vitamin D deficiency
What happens to light skin under low levels of UV?
Minimal damage to folic acid
Lower cholesterol + UV –> Vitamin D
What happens to light skin under high levels of UV?
Few melanocytes cause greater loss of folic acid
Sunburn and skin cancer
Folic acid - 5 benefits
Prevents anemia Cell division Important for normal heart function and immune system Nervous system DNA replication
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
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)
Qhite skin makes vitamin D ____ due to UV rays
More easily
Dark skin is not very good at making _____. Therefore more _____ is needed to offset dark skin.
Vitamin D; cholesterol
What are advantages of dark skin?
Prevents sunburn and skin cancer
Protects folic acid from being destroyed by UV light
What are disadvantages of dark skin?
More difficult to make Vitamind D
Associated with high levels of cholesterol
What are advantages of light skin?
Easier to make Vitamin D
Lower levels of cholesterol
