Fats Flashcards
What is the difference between fats and oil?
Fat is solid at room temperature and oil is liquid at room temperature.
What are the similarities between fats and oil?
They have the same functions.
What are the functions of fat?
Provides the fat soluble vitamins (A, D, E and K)
Protects vital organs
Make all body cells. Concentrated source of energy
Keeps body warm
Provides essential fatty acid
What are the functions of fat in food?
Improves flavour, texture and smell
Makes food easier to swallow
Takes longer to digest and slows stomach from emptying.
What are the sources of fat?
Visible, invisible, animal and plant.
Visible Fat:
Can be seen (meat rind/marbling and butter).
Invisible fat:
Can’t be seen easily (crisps, biscuits, cakes and emulsions-milk).
What are emulsions?
Fat molecules that have been dispersed in water e.g milk.
Animal fat:
Butter, ghee, lard, meat, oily fish, hard cheeses, cream, eggs, chocolate and pastries. (Dairy based products).
Plant fat:
Vegetable oil, avocados, olives, nuts, seeds and fat spreads.
What is hydrogenation?
The process when vegetable oils are hardened to become solids at room temperature. These contain trans fats and are thought to cause heart problems.
What is the chemical name for fat?
Triglyceride
What is triglyceride made up of?
3 fatty acids and 1 glycerol molecule. It can either be saturated or unsaturated.
What is the chemical structure of triglyceride?
Saturated fat=single bonds made up of 1 carbon and 3 hydrogen molecules (full).
Unsaturated=some missing hydrogen atoms. Forms a double bond.
What are some sources of saturated fat?
Meat and some vegetable oils e.g coconut oil.