4.2.1 Aerobic And Anaerobic Respiration Flashcards
Respiration
A chemical reaction in cells to produce energy from food we eat
Breathing
Physically moving air in and out of the lungs
Where does aerobic respiration take place? (2p)
- In all living cells
- All the time
Glucose equation
C6H1206
What is the energy from aerobic respiration used for? (4p)
- Muscle contractions to allow movement in animals
- Active transport
- Maintaining body temperature
- Building large molecules from small molecules
What happens when aerobic respiration takes place faster?
- You get more energy
Where does aerobic respiration take place?
Mitochondria
Word equation for aerobic respiration
Glucose + Oxygen = carbon dioxide + water
Balanced symbol equation for aerobic respiration?
C6H12O6 + 6O2 = 6CO2 + 6H2O
Types of respiration
Aerobic
Anaerobic
Where does Anaerobic respiration occur?
Cytoplasm
Word equation for anaerobic respiration?
Glucose = lactic acid
How much energy does Anaerobic respiration release?
It’s much less than with aerobic respiration
Why is Anaerobic respiration faster than aerobic respiration?
The glucose isn’t broken down completely
What problems occur when anaerobic respiration occurs over a prolonged period?
A build-up of lactic acid in muscles can cause cramp and muscle fatigue
Oxygen debt
The volume of oxygen needed to break down the lactic acid
Anaerobic respiration in plants and yeast
Fermentation
What is fermentation used for
- Making bread, wine, and bear
Why is fermentation not sustainable for long periods of time?
Ethanol levels build up over time and will eventually kill the plant or yeast cells
Fermentation equation
Glucose = ethanol + carbon dioxide
Why do muscle become fatigued during exercise?
- Build up lactic acid, which causes muscle weakness
Lactic acid symbol
C3H6O3
