Respiration Flashcards
What is respiration
The process of transferring energy from glucose
Where does energy come from
Food
How is energy transferred
Respiration
What happens to energy transferred by respiration
It can’t be used by cells so it makes a substance called ATP
What does ATP ado
Stores energy needed for cell processed
How does atp work
When. A cell needs energy atp molecules are broken down and energy is released
What are the two types of respiration
Anaerobic and aerobic
What is aerobic respiration
Respiration that happens WITH oxygen
What does aerobic respiration produce
32 molecules of atp per molecule of glucose
What is the word equation for aerobic respiration
Glucose + oxygen goes to carbon dioxide + water
What is the chemical equation for aerobic respiration
C6h12o6 goes to 6co2 + 6h2o
What is anaerobic respiration
When you do vigorous exercise your body can’t supply enough oxygen to your muscles for aerobic respiration so your muscles have to start respiring anaerobically too
What does anaerobic respiration produce
Less energy, 2 molecules of atp per glucose molecule
What happens during anaerobic respiration
The glucose is only partially broken down and lactic acid is also produced. The lactic acid builds up in the muscles
What is the word equation for anaerobic respiration
Glucose goes to lactic acid
How can you detects carbon dioxide production
With an hydrogen carbonate indicator.
What colour is hydrogen carbonate indicator
Orange to start and changes to yellow in the presence of carbon dioxide
How do you test for co2 with hydrogen carbonate indicator
- Soak dried beans in water for two days, they will germinate and respire
- Boil a similar sized second bunch of dried beans. This will kill the beans so they can’t respire and they will be the control.
- Put the same amount of hydrogen carbonate indicator in two test tubes
- Place a platform made of gauze into both test tubes and place the beans on this
- Seal the test tubes with a rubber bung
- Leave both test tubes for 1 hours
- After one hour the co2 in the germinating beans should have had an affect on the hydrogen carbonate indicator and turned it yellow
How can you measure temperature change produced by respiration
- Prepare two sets of beans
- Add each set of beans to a vacuum flask making sure there’s air left in the flasks so the beans can respire aerobically
- Place a thermometer in each flask and record the temp daily for a week
- Repeat the experiment 10 times.
- When the germinating beans the flasks temp will increase compared to the control.
