Food: Lipids Flashcards
1
Q
Lipids
A
Fats: solid at room temperature and extracted from animals
Oil: liquid at room temperature and extracted from plants
2
Q
Elements in lipids
A
(C) Carbon (H) Hydrogen (O) Oxygen No fixed ratio Very little oxygen
3
Q
Structure of triglyceride
A
1 fatty acid 1 G L Y C fatty acid 2 E R O L fatty acid 3
4
Q
Phospholipid definition
A
Fat like substances in which one of the fatty acids are replaced with a phosphate group or has a phosphate group added to it
5
Q
Role of lipids (Structurally)
A
Cell membranes contain phospholipids
Stored uner the skin for insulation
Protection of delcicate organ e.g kidney
Myelin sheath - layer of fat surrounded by nerve cell to speed up nerve transmissions
6
Q
Role of lipids (metabolism)
A
Long term energy store - they can be converted to carbohydrates to release energy in respiration
Each gram of fat contains twice as much energy as 1 gram of carbohydrates
7
Q
Source of lipids
A
Dairy Fish Fried food Meat Butter Oil
