Diet and Food test (Mini) Flashcards
How is food used in the body?
The energy is released from the food in our body cells by a process called respiration.
What is the energy released by food used for? (4)
- Growth and repair
- Heat
- Movement
- Protection against disease
What are the seven food groups?
Carbohydrates, fats, proteins, fibre, water, minerals and vitamins
What is the main function of carbohydrates?
- Used as main source of energy.
What is the main function of fats?
- Used for food storage and insulation.
- It will be used for energy when the body uses up its carbohydrate stores
What is the main function of protein?
- Used for growth and repair of cells tissues and organs
What is the main function of fibre?
- This keeps the contents of the gut moving (prevents constipation).
- It also reduces the chances of bowel cancer.
What is the main function of water?
- It allows chemical reactions to occur, keeps you cool and transports wastes etc.
What is the main function of minerals?
- Help body to function properly. 16 different minerals are known to be needed in our diets.
What is the main function of vitamins?
- Help body to function properly and help keep the body healthy.
What are the two types of carbohydrates?
Sugar and starch
What foods can carbohydrates be found in?
Sugars are found in; fruit and sweets
Starch is found in; bread, rice, pasta
What foods can fats be found in?
dairy produce and red meat
What foods can protein be found in?
fish, chicken, beans and nuts
What foods can fibre be found in?
wholegrain products, brown rice, fruit and vegetables.
What foods can water be found in?
drinks, fruit and vegetables
What foods can minerals be found in?
mineral calcium is found in dairy produce and iron in found in red meat.
What foods can vitamins be found in?
fruit and vegetables
Balanced diet definition
a diet that contains all the 7 food groups in the correct quantities.
Malnutrition definition
A diet that contains enough food, but doesn’t contain the 7 food groups in the correct quantities
Starvation definition
When a person doesn’t have enough food to provide their body with its needs.
What is the chemical test for starch?
Iodine
What is the chemical test for protein?
Biuret reagent
What is the chemical test for fats?
Ethanol and water
What is the chemical test for sugar?
Benedicts reagent
What is a positive colour change for starch test (iodine)?
Orange/brown → blue/black
What is the chemical test for vitamin c?
DC PIP
What is a positive colour change for sugar test (benedicts)?
Blue → green → orange → brick red
What is a positive colour change for fats test?
Colourless → white emulsion
What is a positive colour change for protein test (biuret)?
Blue → purple
What is a positive colour change for Vitamic test (DC PIP)?
Blue → colourless
What is the method for Vitamin c test?
Add drops OF food sample TO DCPIP solution.
