9.3 Anaerobic respiration Flashcards
Whats the word equation for anaerobic respiration
Glucose -> lactic acid + energy
symbol equation for anaerobic respiration
C6H12O6 -> 2C3H6O3 + energy
word equation for anaerobic respiration in plants and microorganisms
glucose -> ethanol + carbon dioxide
Why is anaerobic respiration not as efficient as aerobic
Glucose molecules are only partially broken down
What happens if lactic acid builds up
the muscles stop working and you get a muscle cramp
What is oxygen debt
The build up of lactic acids in the muscles as a result of anaerobic respiration
How will being fit help you to exercise longer
Your heart and lungs will be able to keep a good supply of oxygen going to your muscles while you exercise for a relatively long time.
If you are unfit your muscles will run short of oxygen much sooner
Where does anaerobic respiration take place
cytoplasm
What happens to the lactic acid from anaerobic respiration
Oxygen is needed to break down lactic acid turning it into carbon dioxide and water
Why will your heart rate and breathing rate stay high after exercise
to supply the extra oxygen needed to pay off the oxygen debt
Oxygen debt repayment equation
lactic acid + oxygen -> carbon dioxide + water
What is anaerobic respiration in yeast cells used for
fermentation
How to workout the lactate threshold
where anaerobic respiration begins to increase sharply
Suggest reasons for a better lactate threshold
- fitter
- better gas exchange
- gets more oxygen to the respiring tissues
- better cardiovascular system
- has a bigger capacity to increase oxygen supply to tissues
- starts anaerobic respiration at a higher exercise level
Oxygen intake levels remain high during the recovery period. Explain how oxygen intake relates to the event that happen in the body once exercise stops
- Oxygen is needed to break down lactic acid
- replaces lactic acid with carbon dioxide and water in the liver
- Respiration stays high
- heart needs to beat fast to circulate blood
