ATP-PC SYSTEMS
What fuel does the ATP–PC system use?
Phosphocreatine (PC)
What is the main fuel source for the anaerobic glycolysis system?
Carbohydrates (glucose/glycogen)
What fuels does the aerobic system use?
Carbohydrates, fats, and sometimes protein
Which system produces energy the fastest?
ATP–PC system
A basketball jump shot mainly uses which system?
ATP-PC
How long does the ATP–PC system typically last?
0–10 seconds
What by-product causes fatigue in this system?
Lactate + hydrogen ions
When does the aerobic system become dominant?
After about 2 minutes of continuous activity
Which system produces the most ATP?
Aerobic system
A 2-minute boxing round relies mostly on which system?
Anaerobic glycolysis
What type of activities rely on the ATP–PC system?
Short, explosive movements (e.g., sprint start, long jump)
How long does this system dominate for?
10 seconds to 2 minutes
What are the by-products of aerobic respiration?
Carbon dioxide, water, and heat
Which system produces lactate?
Anaerobic glycolysis system
A 5km run relies mostly on which system?
Aerobic
Why does the ATP–PC system fatigue quickly?
PC stores run out rapidly
Name a sport that heavily uses this system.
400m sprint, repeated sprints, boxing rounds
Name a sport that relies heavily on the aerobic system.
Long-distance running, cycling, swimming
During a 200m sprint, which two systems dominate?
ATP–PC and anaerobic glycolysis
A tennis rally lasting 20 seconds uses which system?
Anaerobic glycolysis
How long does it take to fully replenish PC stores?
2–3 minutes
Why does this system produce energy faster than the aerobic system?
It doesn’t require oxygen
Why is the aerobic system considered the most efficient?
It produces the most ATP per molecule of fuel
During a marathon, which system is dominant and why?
Aerobic system (long duration, oxygen available)
A footballer sprinting, jogging, and walking throughout a match uses what combination?
All three systems working together, with aerobic dominant overall