LIFE PROCESSES

Question 1

word equation for aerobic respiration

Answer 1

glucose + oxygen -> carbon dioxide + water + (energy)

Question 2

which system does the body get glucose for respiration

Answer 2

the digestive system

Question 3

in which part of our cells does respiration mainly occur

Answer 3

mitochondria

Question 4

products of respriration

Answer 4

carbon dioxide, water

Question 5

test for carbon dioxide

Answer 5

limewater turns cloudy

Question 6

the word aerobic indicates the presence of which gas

Answer 6

oxygen

Question 7

which unit is energy usually measured in

Answer 7

joules, J

Question 8

how many joules in a kilojoule

Answer 8

1000J

Question 9

symbol for kilojoule

Answer 9

kJ

Question 10

if a food is high in energy then what nutrient/s is it likely to contain

Answer 10

lipids/fats, carbs

Question 11

7 nutrients

Answer 11

carbohydrates
proteins
lipids
vitamins
minerals
water
fibre

Question 12

foods high in which nutrient help repair muscles

Answer 12

protein

Question 13

why do we need fibre

Answer 13

to add bulk to the food and help it pass through the digestive system (prevents constipation)

Question 14

what can we get if we don’t get enough vitamin c

Answer 14

scurvy

Question 15

2 sources of vitamin c

Answer 15

fruit and veg

Question 16

examples of carbs

Answer 16

rice, potato and bread

Question 17

examples of protein

Answer 17

meat, fish and nuts

Question 18

sugar and starch are both types of

Answer 18

carbs

Question 19

which test do we use to detect the presence of starch

Answer 19

iodine

Question 20

when testing for starch what colour indicates a positive result

Answer 20

brown to black

Question 21

which test do we use to detect the presence of sugar

Answer 21

Benedicts

Question 22

when testing for sugar what colour change indicates a positive result

Answer 22

blue to red

Question 23

which test do we use to detect the presence of protein

Answer 23

Biuret

Question 24

when testing for protein which colour change indicates a positive result

Answer 24

blue to purple

Question 25

which test do we use to detect the presence of fat

Answer 25

Ethanol

Question 26

when testing for fats what change indicates a positive result

Answer 26

cloudy emulsion formed

Question 27

what is digestion

Answer 27

the process of breaking down food into substances our body can absorb and use

Question 28

where does mechanical digestion mainly occur

Answer 28

in the mouth

Question 29

list the organs the food will travel through on its way through the digestive system

Answer 29

mouth, oesophagus, stomach, small intestine, large intestine, rectum, anus

Question 30

which nutrient starts to be chemically digested in the mouth

Answer 30

carbohydrate

Question 31

where does the digestion of protein take place

Answer 31

stomach, small intestine

Question 32

where does the digestion of lipids take place

Answer 32

small intestine

Question 33

which organ produces lipase protease and carbohydrase

Answer 33

pancreas

Question 34

what is the purpose of hydrochloric acid in the stomach

Answer 34

provides the right pH for the protease enzymes, kills bacteria

Question 35

what is the purpose of bile in the digestive system

Answer 35

neutralise the acid which was added to food in the stomach to give the best pH for enzymes to work, break down (emulsify) fat