Aerobic system Flashcards
1
Q
Stage 1 Glycolysis
A
- occurs in the presence of oxygen
- lactic acid is not produced and the pyruvic acid is converted into a compound called acetyl coA
2
Q
Acetyl coA
A
moves into the mitochondria within the muscle cell where the remaining stages are activated.
3
Q
Stage 2 Krebs cycle
A
- once the pyruvic acid diffuses into the matrix of the mitochondria a complex cycle of reactions occurs in a process known as Krebs cycle.
ACETYL coA (converted) Citric acid via carbon dioxide and hydrogen
(2ATP)
4
Q
Stage 3 Electron transport chain
A
- hydrogen is carried to the electron transport chain by hydrogen carriers.
- this occurs in the Cristae of the mitochondria.
- the hydrogen splits into hydrogen ions (H+) and (H-) and these are charged with potential energy
- water and 34 ATP are produced.
5
Q
Aerobic system and free fatty acids
A
- fats are also used as an energy source in the aerobic system.
- Triglycerides are turned into glycerol and free fatty acids through (LIPASE) which is then turned into Acetyl coA through (BETA OXIDATION).
- in long duration exercise fatty acids will be the predominant energy source.
6
Q
Advantages of aerobic system
A
more ATP produced.
no fatiguing byproducts.
7
Q
Disadvantages of aerobic system
A
take a while for oxygen to become available
fatty acid transportation is slow.
8
Q
Type of reaction
A
aerobic
9
Q
Site of reaction
A
Stage 1 - Sarcoplasm
stage 2 - mitochondria matrix
stage 3 - mitochondria Cristae
10
Q
Intensity of system
A
low/moderate intensity
sub maximal exercise.
11
Q
Sporting example
A
5000m marathon runner.
