diet 2.24, 2.25, 2.26, 2.33B

Question 1

what is a food source of carbohydrates?

Answer 1

potatoes, bread, rice, cereals, fruit

Question 2

what’s the function of carbohydrates?

Answer 2

fuel for respiration

Question 3

what’s a food source of proteins?

Answer 3

meat, eggs, fish, quinoa, quorn

Question 4

what’s the function of proteins?

Answer 4

growth and repair of cells and tissues
fuel for respiration

Question 5

what’s a food source of lipids (fats)?

Answer 5

butter, cooking oil, cream, avocados

Question 6

what’s the function of lipids (fats)?

Answer 6

store of energy
(thermal and electrical) insulation
fuel for respiration

Question 7

what is energy measured in?

Answer 7

kilojoules (kJ)

Question 8

practical -
measuring the energy content of a food sample:

Answer 8

• measure 25 cm3 of water into a boiling tube and record starting temperature
• measure the mass of food
• then mount food onto skewer
• set fire to food using bunsen burner
• hold the burning food under the boiling tube until it goes out
• keep doing this until the food wont light
• measure the finial temperature of water
  then use equation

ENERGY IN J = MASS OF WATER IN G X TEMPERATURE CHANGE X 4.2 / MASS OF FOOD

Question 9

how do u work out the amount of energy in the food?

Answer 9

ENERGY IN J = MASS OF WATER IN G X TEMPERATURE CHANGE X 4.2 / MASS OF FOOD

Question 10

function of iron:

Answer 10

forms the part of haemoglobin which binds to oxygen

Question 11

food source of iron:

Answer 11

read meat, liver, spinach

Question 12

deficiency disease caused by low iron:

Answer 12

anaemia

Question 13

function of calcium:

Answer 13

needed to form bones and teeth

Question 14

food source of calcium:

Answer 14

milk, dairy products, fish, fresh vegetables

Question 15

deficiency disease caused by low calcium:

Answer 15

rickets

Question 16

is iron and calcium a mineral or vitamin?

Answer 16

mineral

Question 17

use in the body of vitamin A:

Answer 17

making chemicals in the retina and protecting the surface of the eye

Question 18

use in the body of vitamin C:

Answer 18

needed for cells and tissues to stick together

Question 19

use in the body of vitamin D:

Answer 19

needed to absorb calcium and phosphate ions from food

Question 20

effect of deficiency in vitamin A:

Answer 20

night blindness and damaged cornea

Question 21

effect of deficiency in vitamin C:

Answer 21

scurvy

Question 22

effect of deficiency in vitamin D:

Answer 22

rickets caused by weak bones

Question 23

food source of vitamin A:

Answer 23

fish liver oil, liver, butter, carrots

Question 24

food source of vitamin C:

Answer 24

fresh fruit and veg

Question 25

food source of vitamin D:

Answer 25

diary products, oily fish

Question 26

why is water important?

Answer 26

an essential solvent used to transport components of the blood and it is crucial for temp regulation

Question 27

why is fibre important?

Answer 27

helps movement of food through the intestines preventing constipation and bowel cancer

Question 28

the more active you are …

Answer 28

the more energy you need

Question 29

the younger you are …

Answer 29

the more energy you need as they grow more and more active

Question 30

if you are pregnant …

Answer 30

you need more energy as you need to develop baby