diet

Question 1

definition of balanced diet

Answer 1

a variety of different types of food (list all seven) providing the right amounts of nutrition necessary

Question 2

7 components of a balanced diet

Answer 2

-carbohydrates
-protein
-lipids and fats
-vitamins
-minerals
-water
-fibre

Question 3

carbohydrates:chemical elements, structure, source, function, deficiency disease

Answer 3

chemical elements - C H O
structure - starch, glycogen
source - (starch) potato, pasta
(glucose)chocolate, sweets
function - energy
deficiency disease - headaches, fatigue, weakness

Question 4

lipids: chemical elements, structure, source, function, deficiency disease

Answer 4

chemical elements - C H O
structure - fatty acids glycogen
source - oils, nuts, avocado
function - energy storage, protection of organs, insulation
deficiency disease - rashes, hair loss, weaker immune system

Question 5

protein: chemical elements, structure, source, function, deficiency disease

Answer 5

chemical elements - C H O N
structure - amino acids
source - meat, pulses, beans
function - growth + repair, enzymes
deficiency disease - weakness, fatigue

Question 6

water: source, function, deficiency disease

Answer 6

source - food + drink
function - transportation around body, reactions happen in fluids
deficiency disease - dehydration

Question 7

fibre: source, function, deficiency disease

Answer 7

source - whole grain foods, cereals, fruit + veg
function - prevents constipation, helps peristalsis
deficiency disease - constipation, heart disease, irritable bowl syndrome (IBS)

Question 8

minerals: Iron: source, function, deficiency disease

Answer 8

source - red meat, spinach
function - production of haemoglobins
deficiency disease - aneamia

Question 9

minerals: Calcium: source, function, deficiency disease

Answer 9

source - dairy products
function - bone + teeth development
deficiency disease - rickets

Question 10

vitamins: A: source, function, deficiency disease

Answer 10

source - carrots, fish liver oil, liver
function - pigment in vision
deficiency disease - night blindness

Question 11

vitamins: C: source, function, deficiency disease

Answer 11

source - citrus fruits, broccoli, green veg
function - healthy skin, wound healing (gums)
deficiency disease - scurvy

Question 12

vitamins: D: source, function, deficiency disease

Answer 12

source - made in skin by acting sun, fish liver oil, dairy products
function - helps absorption of calcium
deficiency disease - rickets

Question 13

food test for carbohydrates ( starch ) and positive result

Answer 13

add iodine to solution, positive result is orange to dark blue/black

Question 14

food test for carbohydrates ( glucose)

Answer 14

add benedicts solution then put tube in boiling water, positive result is blue to brick red

Question 15

food test for protein

Answer 15

add biuret solution, blue to light purple

Question 16

food test for fat

Answer 16

-dissolve in ethanol and pour into cold water, positive result is emulsion/seperation

add Sudan 111 to solution, positive result is seperation

Question 17

energy requirements for age, activity level and pregnancy

Answer 17

age - as you get older you will need to use more energy until after puberty when the amount of energy needed decreases
activity level - the more activity level you do is the more energy
pregnancy - if you are pregnant you need more energy

Question 17

energy requirements for age, activity level and pregnancy

Answer 17

age - as you get older you will need to use more energy until after puberty when the amount of energy needed decreases
activity level - the more activity level you do is the more energy you need
pregnancy - if you are pregnant you need more energy

Question 18

calorimeter

Answer 18

• burn food and measure heat increase in water
  -measure mass of the food sample before burning
• heat gained ÷ mass = energy per gram