Anaerobic Respiration Flashcards
What is anaerobic respiration?
Respiration without the use of oxygen
Compare the energy released in aerobic respiration and anaerobic respiration
In Anaerobic respiration less energy is released and aerobic respiration releases much more energy
What is the written formula for anaerobic respiration?
Glucose ——-> lactic acid + Energy
Where does anaerobic respiration take place and why does this explain the fact that no oxygen is used?
- takes place in the mitochondria when the body CANT DELIVER OXYGEN TO MUSCLE CELLS QUICKLY ENOUGH
When can anaerobic respiration occur and give two examples?
- can happen when any muscle is working intensely
- during sprinting+ intense exercise
Describe the process of anaerobic respiration
Glucose DECOMPOSES to PRODUCE lactic acid and releases energy
What can lactic acid cause?
Lactic acid can BUILD up causing MUSCLE FATIGUE and CRAMP
Why is lactic acid made?
Because the glucose is not completely broken down
Describe why sprinters have to breathe heavily after a race in 4 STEPS
- during the race anaerobic respiration occurs
- there is waste lactic acid in the athletes blood
- this needs to be broken down into carbon dioxide and water
- the amount of oxygen needed to do this is called the “oxygen debt”
What is oxygen debt? (2 definitions)
- The amount of oxygen needed to oxidise all the waste lactic acid that has been built up in the muscles
-Oxygen debt is the extra amount of oxygen that the body needs after exercise
Describe the process of oxygen debt by exercise in 5 STEPS
- muscles get fatigued as they are respiring anaerobically which means less energy is released
- there is a build up of lactic acid in the muscles
- when exercise is over the lactic acid needs to be oxidised to carbon dioxide and water
- the blood takes the lactic acid to the liver where it is oxidised
- the amount of oxygen needed to oxidise all the waste lactic acid= the oxygen debt
When do plants and yeast cells respire anaerobically?
They also respire anaerobically when oxygen is in short supply
How is anaerobic respiration different in PLANTS AND YEAST CELLS?
- they produce ethanol and carbon dioxide instead of lactic acid
What is anaerobic respiration known as in YEAST and why is it imporant? (2 points)
- Fermentation
- has important uses in food and drink industry
What is a use of the carbon dioxide produced in fermentation?
The carbon dioxide produced during fermentation is what makes bread rise
What is a use of the ethanol (alcohol) produced in fermentation?
- ethanol (alcohol) produced in fermentation is used in beer+ wine making
What are THREE similarities of aerobic and anaerobic respiration in YEAST CELLS?
- both forms of respiration use glucose as the source of energy
- both release energy
- both produce the waste product carbon dioxide
What are TWO differences of aerobic respiration with anaerobic respiration in PLANTS+ YEAST CELLS?
- aerobic respiration releases much more energy than anaerobic respiration
- in anaerobic respiration (IN PLANTS+ YEAST CELLS) the second waste product is ethanol whereas in aerobic it’s water
What are TWO similarities of anaerobic respiration (normal) and aerobic respiration?
- both forms of respiration use glucose
- both forms of respiration release energy and produce waste products
What are THREE differences of aerobic respiration and anaerobic respiration (normal)?
- aerobic respiration releases more energy than anaerobic respiration
- aerobic respiration uses oxygen whereas anaerobic does not
- DIFFERENT waste products= aerobic produces carbon dioxide+water and anaerobic produces lactic acid
What are three things that oxygen debt is used for?
- convert lactic acid back into glucose
- replenish oxygen stores
- restore energy levels in the muscles
