diet

Question 1

What are the components of a balanced diet?

Answer 1

-carbohydrates
- proteins
- lipids (fats)

Question 2

Examples of carbohydrates

Answer 2

-bread
-potatoes
-rice
-fruit

Question 3

function of carbohydrates

Answer 3

• fuel for respiration

Question 4

proteins examples

Answer 4

• meat
  -eggs
  -fish
• beans/pulses

Question 5

proteins function

Answer 5

• growth and repair of cells and tissues
  -fuel for respiration

Question 6

Lipids examples

Answer 6

• butter
• cooking oil
• cream
  -avocados

Question 7

function of lipids

Answer 7

• store of energy
  -electrical and thermal insulation
• fuel for respiration

Question 8

-how to find energy content of food sample

Answer 8

-measure 25cm^3 of the water and pour into boiling tube
- record starting temp
- known mass of food is lit over bunsen
- hold lit food sample under boiling tube to water to heat it
-if food stops burning then it should be relit until it no longer burns
- find temp change of water in boiling tube
-find energy content by doing
temp change x mass of water x 4.2
—————————————————
mass of food

Question 9

Iron function

Answer 9

-forms the part of haemoglobin which binds to oxygen

Question 10

Sources of iron

Answer 10

-red meat
-liver
-spinach

Question 11

Iron deficiency disease

Answer 11

-anaemia

Question 12

Calcium function

Answer 12

• needed to form bones and teeth

Question 13

calcium sources

Answer 13

-milk and dairy products
- fish
- fresh veg

Question 14

Calcium deficiency disease

Answer 14

-rickets

Question 15

Vitamin A function

Answer 15

• makes chemical in retina
• protects surface of eye

Question 16

Effect of Vitamin A deficiency

Answer 16

• night blindness
• damages cornea

Question 17

vitamin A sources

Answer 17

• fish liver oil
• liver
• butter
• carrots

Question 18

Vitamin C function

Answer 18

• needed for cells and tissues to stick together

Question 19

vitamin C deficiency effect

Answer 19

• Scurvy

Question 20

Vitamin C source

Answer 20

• fresh fruit and veg

Question 21

Vitamin D function

Answer 21

• to absorb calcium and Phosphate ions from food

Question 22

Vitamin D deficiency effects

Answer 22

• rickets- due to weak bones

Question 23

Source of vitamin D

Answer 23

• dairy products
  -oily fish

Question 24

why is water essential for a balanced diet

Answer 24

-it allows things to be dissolved into it
- used to transport the components of blood
- crucial for temperature regulation eg sweating

Question 25

Why is fibre essential for a balanced diet

Answer 25

-it helps movement of food through the intestine, preventing constipation and bowel cancer

Question 26

test for proteins

Answer 26

-biurets solution -blue to mauve if present

Question 27

test for lipids

Answer 27

-ethanol -shake -goes colourless to cloudy if present

Question 28

test for glucose

Answer 28

-benedict's solution -water bath 80 degrees C for 5 mins -blue to brick red if present

Question 29

test for starch

Answer 29

-few drops of iodine -orange to blue/black if present