B2.6 Aerobic and Anaerobic Respiration Flashcards
What is aerobic respiration?
Glucose + oxygen -> Carbon dioxide + water +(energy)
What are the wast products of aerobic respiration?
Carbon dioxide and water
In aerobic respiration, are glucose and oxygen used up?
No
Where does respiration happen inside the body?
In the mitochondria of the cell
What is energy produced by respiration used for?
- Muscle contraction (movement)
- Temperature regulation
- Building larger molecules (eg amino acids frome nitrates)
Why are athletes out of breath after exercising?
Muscle cells respire at a faster rate so they need more oxygen and glucose to be able to continue
Why does heart rate increase while exercising?
More blood needs to be passed around the body in order to continue delivering oxygen and glucose to the respiring muscles
How does the increased depth and rate of breathing alter the rate of gas exchange in the lungs?
It INCREASES
How do plants and animals store glucose differently?
Plants store glucose as starch whereas animals store glucose as GLYCOGEN
What’s the difference between BREATHING and RESPIRATION?
Respiration releases energy whereas breathing exchanges air in and out
What is anaerobic respiration and why does it occur?
Glucose -> lactic acid + (5% of energy produced in aerobic respiration)
Anaerobic respiration is the incomplete breakdown of glucose when there is insufficient oxygen present
What causes muscle fatigue?
When muscles aren’t contracting sufficiently
Build up of lactic acid in the muscles
What eases a build up of lactic acid?
Efficient blood flow (to reoxygenate)
Why are fit people better at exercise than unfit people?
Their pulse rate is able to return to normal more quickly than unfit people
What is oxygen debt?
Anaerobic respiration produces an oxygen debt
This is the amount of oxygen needed to oxidise the lactic acid into co2 and water
This is why people continue to be out of breath after exercise as they have to make up for the oxygen debt
