Energy System Flashcards
How long does stored ATP last?
2 seconds
What enzyme splits ATP?
ATPase
When ATP is split what compound is left?
ADP
How do you get ATP from ADP
Creatine Kinase splits phosphocreatine which supplies the phosphate needed to make ADP into ATP.
What’s the duration, intensity and waste products of the ATP-PC system
8-12 seconds duration
100% intensity
No waste products
What does anaerobic glycolysis mean?
Breakdown of glucose without 02
How many ATP are produced from the breakdown of glucose?
2ATP
When a glucose molecule is split by phosphofructokinase (PFK) what waste products are produced?
Pyruvic Acid
Hydrogen Ions
When an athlete is working above 85% of MHR there is not enough 02 to help remove Pyruvic Acid and Hydrogen - what happens to these waste products?
They bind causing lactate. Lactate is so acidic it stops enzymes like ATPase from working.
What’s the duration, intensity and waste products of the Lactate Anaerobic System?
60-90 seconds
85% and above of MHR
Pyruvic acid, hydrogen and eventually Lactate.
The aerobic system means that 02 is available to manage the waste products of anaerobic glycolysis. What now happens to Pyruvic acid and Hydrogen Ions?
Pyruvic acid goes to the krebs cycle and is turned into 2ATP and Carbon Dioxide
Hydrogen ions go to the Electron Transport Chain and are turned into H20 and 34 ATP
The Aerobic system produces how many ATP in total?
36 ATP
2 ATP from Krebs Cycle
34 ATP from ETC
What’s the duration, intensity and waste products of the Aerobic system?
Unlimited duration
85% and below of maximum heart rate
No waste products as they are managed by the krebs cycle and ETC
What is the deciding factor as to what energy system is used by the body?
Intensity
What 2 adaptations to exercise occur in the anaerobic energy systems?
Increased creatine stores
Increased tolerance to lactate
