Energy Systems - Aerobic
If oxygen is present what does pyruvic acid become
Acetyl CoA
Explain the Krebs cycle
1.Takes place in the Mitochondria
2.Acetyl CoA combines with oxaloacetic acid to make Citric Acid
3.There is then a complex series of reactions
4.2 ATP produced.
5.By-products are CO2 and Hydrogen (to create NADH) and carried through to ETC.
Explain the ETC (electron transfer chain)
1.Takes place in the cristae of mitochondria
2.Hydrogen split into Ions and Electrons
3.Electrons passed down chain (NADs & FADs - carrier molecules).
4.Hydrogen ions are oxidised (Hydrogen and oxygen combine) to produce 32 ATP
5.By-products are H2O and CO2
Advantages
1.It is a very efficient production of energy (for example 36 ATP for every molecule of glycogen).
2.It is almost limitless energy production potential
3.There are no fatiguing by products
4.It uses fats as an energy source.
Disadvantages
1.It is only suited to low-to-moderate intensity activities.
2.It takes time to transition to the system
3.It takes up to 20 minutes to start to use fats as an energy source.