ATP-PC systems Flashcards
ATP splitting
- Adenosine triphosphate
- Enzyme ATPase breaks 3rd bond which produces energy to move
- Left with Adenosine diphosphate and a free phosphate
- Resynthesise ATP
ATP-PC system process
- Creatine kinase detects high levels of ATP
- Breaks down PC- releasing energy
- The energy is then used to convert ADP to ATP in a coupled reaction (1:1)
- No fatiguing by products but runs out quickly
- If want to work at high intensity for longer need to use anaerobic glycolysis as another course of energy to resynthesise ATP
What is the intensity of the ATP-PC
HIGH
What is the duration of the ATP-PC system
Short duration- (2-10 seconds)
What is the activity that the ATP-PC uses its energy for
100m
What are the enzymes involved in the ATP-PC system
Creatine kinase
What is the fuel for the ATP-PC system
Phosphocreatine
What is the net gain of ATP in the ATP- PC system
1:1
What is the site of the ATP-PC system in the body
Sarcoplasm
Advantages of the ATP-PC system
+ ATP can be resynthesise rapidly
+ No fatiguing by products
+ PC stores can be replenished quickly (50% in 30 seconds)
Disadvantages of the ATP-PC system
- Limited supply of PC- 10 seconds
- 1:1
- PC re-synthesise only tackle place with O2- Exercise intensity is reduced
Differences in ATP generation in slow twitch type 1 muscle fibres
- Main pathway is aerobic
- Produces the maximum amount of ATP = 38 ATP
- Production is slow but fibres are more endurance based so less likely to fatigue
Differences in ATP generation in fast twitch type 2x muscle fibre
- Main pathway
- ATP production in the absence of O2 isn’t efficient- only 2ATP
- Production of ATP is fast but will not last for long as fibres have least resistance to muscle fatigue
The energy continuum
Type of respiration used by an activity. Anaerobic and Aerobic dependant on the intensity and duration of exercise
