Respiration

Question 1

Respiration is

Answer 1

the process of transferring energy from glucose. it goes on in every cell in your body

Question 2

where does respiration happen

Answer 2

in every cell of your body

Question 3

can the energy transferred in respiration be used directly by the cells ?

Answer 3

no

Question 4

what is the energy produced by respiration used for

Answer 4

to make a substance called ATP

Question 5

what does ATP do

Answer 5

releases the energy needed for many cell processes

Question 6

what type of reaction is respiration

Answer 6

a chemical reaction

Question 7

from where is energy released in respiration

Answer 7

glucose

Question 8

how is ATP made

Answer 8

during respiration, glucose is broken down and several ATP molecules are produced

Question 9

what does ATP release and how

Answer 9

it can be broken down to release energy for living processes to happen within cells and organisms.

Question 10

what are some processes that need the energy given by ATP ( 3)

Answer 10

• keeping warm
• muscle contractions for movement
• chemical reactions

Question 11

aerobic respiration needs

Answer 11

oxygen

Question 12

what is aerobic respiration defined as

Answer 12

the chemical reaction in cells that uses oxygen to break down nutrient molecules to release energy

Question 13

what is aerobic respiration ( what happens to glucose)

Answer 13

complete breakdown of glucose to release a relatively large amount of energy for use in cell processes and reactions

Question 14

what are the waste products of aerobic respiration

Answer 14

carbon dioxide + water

Question 15

word equation of aerobic respiration in humans

Answer 15

oxygen + glucose —— carbon dioxide + water

Question 16

symbol equation of aerobic respiration for humans

Answer 16

C6H12O6 + 6O2 → 6CO2 + 6H2O

Question 17

does anaerobic respiration need oxygen

Answer 17

no

Question 18

what in anaerobic respiration defined as

Answer 18

the chemical reaction in cells that breaks down nutrient molecules to release energy without using oxygen

Question 19

anaerobic respiration involves (breakdown of glucose)

Answer 19

the incomplete breakdown of glucose and so releases a relatively small amount of energy for use in cell processes

Question 20

is aerobic word equation the same for all living organisms

Answer 20

yes

Question 21

waste product of anaerobic respiration in humans / animals

Answer 21

lactic acid ( when oxygen already in our cells runs out, glucose is broken down so lactic acid is formed)

Question 22

how is lactic acid removed after anaerobic respiration

Answer 22

be broken down using oxygen to produce carbon dioxide and water as waste products

Question 23

which respiration releases less energy

Answer 23

Anaerobic respiration releases less energy than aerobic respiration

Question 24

word equation for anaerobic respiration in animals

Answer 24

glucose— lactic acid (+energy)

Question 25

word equation for anaerobic respiration in plants

Answer 25

glucose ---- ethanol + carbon dioxide (+ energy)

Question 26

when is anaerobic respiration used in animals

Answer 26

during vigorous exercise (usually not very long) , when your body can't supply enough oxygen to your muscles for aerobic respiration.

Question 27

why does lactic acid need to be removed

Answer 27

its a toxic waste product of respiration ( can denature enzymes because it raises pH levels)

Question 28

what respiration is used the most often

Answer 28

aerobic respiration

Question 29

differences between the 2 respirations

Answer 29

AEROBIC - oxygen needed - glucose breakdown is complete - products are CO 2 & H2O - Energy released is a lot ANAEROBIC - oxygen not needed - glucose breakdown is incomplete - products formed lactic acid for animals and carbon dioxide and ethanol for yeast and plants - energy released is little

Question 30

PRACTICAL INVESTIGATING RESPIRATION ( seed germination)

Answer 30

Measure out 10 cm3 of hydrogencarbonate indicator into 3 boiling tubes Put in a layer of cotton wool Place 10 germinating seeds in tube A Place 10 boiled/dead seeds in tube B Place 10 glass beads in tube C Seal each tube with a rubber bung After 3 hours, observe the colour of the indicator

Question 31

results of investigation should be

Answer 31

In this investigation, we would expect to note the following Tube A should turn yellow as the seeds are respiring and producing carbon dioxide Tube B should remain red as the dead seeds produce no carbon dioxide Tube C should remain red as there is no living material in there

Question 32

where does anaerobic respiration take place in animals

Answer 32

muscle cells

Question 33

PRACTICAL - demonstrating the production of heat

Answer 33

set up 2 vacuum flasks, one with dead seeds and one with germinating seeds place a thermometer into it, with cotton wool on the sides holding it in place and trapping the heat. Measure initial temperature after 4 days measure the final temperature ( germinating seeds flask will have a higher temp)

Question 34

what is oxygen debt

Answer 34

the extra oxygen required by your body to break down the lactic acid produced by your body after strenuous exercise.