Digestion

Question 1

why do we need to eat a wide variety of foods?

Answer 1

to provide our bodies with all the substances that are needed

Question 2

what colour does starch make iodine solution go?

Answer 2

navy

Question 3

what is the amount of energy usually found in food packets called?

Answer 3

kilojoules

Question 4

what can too much fat cause?

Answer 4

heart disease

Question 5

what do our bodies need to do to make use of our food?

Answer 5

break it down into smaller molecules

Question 6

what is digestion?

Answer 6

when our bodies break our food up into smaller sized molecules to make use of it

Question 7

what does digestion do?

Answer 7

it turns insoluble substances into soluble ones

Question 8

what do many of the organs of the digestive system do?

Answer 8

produce enzymes

Question 9

what are enzymes?

Answer 9

chemicals that break up our food

Question 10

what is putting food into our mouths called?

Answer 10

feeding or ingestion

Question 11

what do the teeth do?

Answer 11

grind up the food and mix it with saliva

Question 12

what do digestive juices contain?

Answer 12

enzymes

Question 13

what is food swallowed down?

Answer 13

the gullet (food pipe)

Question 14

what produces saliva?

Answer 14

salivary glands

Question 15

what does saliva do?

Answer 15

it breaks down starch into sugar

Question 16

what happens in the stomach?

Answer 16

strong acid is added to the food and more digestive juices are added

Question 17

what do digestive juices do?

Answer 17

break proteins into amino acids

Question 18

what happens in the small intestine?

Answer 18

more digestive juices are added

Question 19

what are carbohydrates digested into?

Answer 19

sugars

Question 20

where are the sugar and amino acids taken?

Answer 20

into the blood steam and then the small intestine

Question 21

what happens to the food substances?

Answer 21

they are absorbed

Question 22

what does the large intestine do?

Answer 22

removes water from the food that cannot be digested

Question 23

what does food that cannot be digested form?

Answer 23

faeces

Question 24

what is pushing faeces out of the anus called?

Answer 24

Egestion

Question 25

where are faeces stored?

Answer 25

in the rectum

Question 26

why is the small intestine covered in villi?

Answer 26

to help absorb the digested food

Question 27

where are the digested food substances carried around in the body?

Answer 27

in the blood

Question 28

what does blood travel through?

Answer 28

blooded self

Question 29

where do arteries carry the blood?

Answer 29

away from the heart

Question 30

where do veins carry blood?

Answer 30

towards the heart

Question 31

what are the smallest blood vessels called?

Answer 31

capillaries

Question 32

what do cells need food substances for?

Answer 32

to release energy and create new substances

Question 33

what do cells use respiration for?

Answer 33

to release energy from glucose