. Flashcards
What does a balanced diet contain
Proteins, carbohydrates, vitamins, minerals, fibre and water
What is the main source of energy
Carbohydrate
Are sugars such as glucose soluble or insoluble
Soluble
Are sugars such as starch soluble or insoluble
Insoluble
Name sources of carbohydrates in the diet
Potatoes, rice, pasta, bread and sugary snacks
What are proteins made up of
Many subunits called amino acids
What are proteins used for
Repair and growth
Sources of protein
Meat, egg, fish and nuts
What are fats used as
A store for energy
What does the layer under the skin help do
Insulate the body
What molecules do fats consist of
A molecule of glycerol joined to 3 fatty acids
Fats and oils together are called
Lipids
Sources of fats in the diet
Meat and vegetable oils
All 3 main foodstuffs are compounds made from the elements
Carbon, hydrogen, oxygen. In addition, proteins contain nitrogen
What is mostly made from cellulose in plants
Fibre
Chemical test with iodine
Changes from brown to blue-black when added to starch
Chemical test with Benedict’s reagent
Changes from blue to brick-red when heated with a reducing sugar eg glucose
Chemical test with Biurets reagent
Changes from blue to lilac in the presence of proteins
Rubbing a source of fat onto paper will leave a
Translucent mark
What quantity should vitamins and minerals taken in the diet
Small qauntities
If your diet does not include enough of a particular vitamin or mineral the body can develop
Deficiency diseases
A lack of calcium may cause
Rickets
Calcium builds
Bones and teeth
Calcium is found in
Dairy products and green leafy vegetables
