Skin Care Flashcards
1
Q
What is a UV light?
A
UV light is a high energy form of light that can break chemical bonds.
2
Q
What stops UV light reaching the skin?
A
Sunblocks
3
Q
What does exposure to UV light cause?
A
Exposure to UV light causes ageing of the skin and can cause sunburn.
4
Q
What are free radicals?
A
Free radicals are highly reactive atoms or molecule with unpaired electrons.
5
Q
What are the steps of the chemical reactions that free radical can take part in?
A
•Initiation
- Always involves the halogen molecule breaking up to form two halogen radicals.
- Propagation
- Termination
- Is combining any two radicals to form a stable molecule.
6
Q
What are free radical scavengers?
A
Free radical scavengers are molecules that react with free radicals to prevent chain reactions.
7
Q
What are free radical scavengers added to?
A
Free radical scavengers are added to cosmetic products such as skin creams. They are also added to foods and plastics.
