Skin Care

Question 1

UV light

Answer 1

High energy radiation which causes skin damage

Question 2

1. Sun blocks

2. Sun screens

Answer 2

1. Reflects UV Ray’s, contains titanium dioxide

2. Contains chemicals which act as UV filters for skin

Question 3

Free Radicals

Answer 3

Atoms with unpaired electrons which make them very reactive and cause damage to skin

Question 4

Free Radical Chain Reaction (formation of free radicals)

Answer 4

Initiation- results in two free radicals
Propagation- results in 1 free radical
Termination- removes all free radicals formed during reaction

Question 5

Free Radical Scavengers

Answer 5

Antioxidants which prevent free radical chain reactions taking place and prevent any damage to cells in body

Question 6

Free Radical Scavengers in cosmetics

Answer 6

Compounds in Vit C, Vit E

Polyphenols effective at being absorbed by dermis and epidermis

Question 7

Free Radical Scavengers in plastics

Answer 7

Known as ‘UV stabilisers’, free radical scavengers are added to plastics to stop O reacting with C’s and prevent degradation

Question 8

Free Radial Scavengers in foods

Answer 8

Vit C, Vit E, more effective as ingested and Polyphenols (flavonoids)