diet and digestion

Question 1

energy comes from what?

Answer 1

food

Question 2

what do humans break food down into?

Answer 2

amino acids, glucose, glycerol and 3 fatty acids

Question 3

equation of combustion?

Answer 3

fuel + oxygen-> carbon dioxide + water

Question 4

describe the banana chip experiment?

Answer 4

-measure mass of food
-place 25cm of water into a boiling tube
-measure starting temp of water
-light food chips on fire and place under a boiling tube of water
-if burns out, re-light until it burns no more
-measure ending temp of water
-the do change in water x 4.2 x volume of water/ mass of food x1000

Question 5

amount of calories pregnant women needs per day?

Answer 5

11,800kj

Question 6

amount of calories builder needs per day?

Answer 6

18,900kj

Question 7

amount of calories school boy needs per day?

Answer 7

10,500kj

Question 8

amount of calories breast feeding women needs per day?

Answer 8

14,700kj

Question 9

amount of calories new born needs per day?

Answer 9

2000kj

Question 10

amount of calories office worker needs per day?

Answer 10

8,400kj

Question 11

amount of calories school girl needs per day?

Answer 11

9,500kj

Question 12

why are carbohydrates needed in a balanced diet?

Answer 12

used for respiration, broken down into simple sugars
-long term energy

Question 13

why are lipids needed in a balanced diet?

Answer 13

used to make cell membranes, insulation, protect vital organs and long term energy store
-thermal, electrical insulation
-hormone use

Question 14

why are proteins needed in a balanced diet?

Answer 14

growth and repair of tissue, broken down into amino acids
-hormone growth
-make enzymes
-growth of muscle and bones

Question 15

why are vitamins needed in a balanced diet?

Answer 15

helps absorb calcium and iron
vitamin A-maintain eyesight
vitamin C- absorb iron to prevent anaemia and make haemoglobin + sticks cells together
vitamin D- needed to absorb calcium for strong bone density

Question 16

why are minerals needed in a balanced diet?

Answer 16

calcium- for strong teeth and bones
iron- make haemoglobin

Question 17

why is water needed in a balanced diet?

Answer 17

stay hydrated, maintain osmosis, blood plasma, needed for chemical reactions and prevent dehydration

Question 18

why is dietry fibre needed in a balanced diet?

Answer 18

helps food move our bodies
-made from cellulose

Question 19

where are the two places amylase is produced?

Answer 19

mouth and pancreas

Question 20

what does amylase break down?

Answer 20

starch to maltose

Question 21

what maltase break down?

Answer 21

maltose to glucose

Question 22

where is pepsin produced?

Answer 22

gastic glands

Question 23

what does pepsin break down?

Answer 23

protein to peptides

Question 24

where is lipase produced?

Answer 24

pancreas

Question 25

what does lipase break down?

Answer 25

lipids to 3 fatty acids + glycerol

Question 26

where is trypsin produced?

Answer 26

pancreas

Question 27

what does trypsin break down?

Answer 27

proteins to peptides

Question 28

where is maltase produced?

Answer 28

lining of the duodenum

Question 29

where is protease produced?

Answer 29

lining of duodenum

Question 30

what does protease break down?

Answer 30

peptides to amino acids