Three metabolic pathways

ATP-PC System Location of activity

Cytoplasm

Glycolysis (Anaerobic Lactic) Location of activity

Cytoplasm

Cellular Respiration (Aerobic) Location of activity

Mitochondria

ATP-PC System Energy source

Creatine phosphate

Glycolysis (Anaerobic Lactic) Energy source

Glucose (glycogen)

Cellular Respiration (Aerobic) Energy source

Glucose

ATP-PC System Uses oxygen or not

Anaerobic (without oxygen)

Glycolysis (Anaerobic Lactic) Uses oxygen or not

Anaerobic (without oxygen)

Cellular Respiration (Aerobic) Uses oxygen or not

Aerobic (with oxygen)

ATP-PC System ATP produced

1 molecule

Glycolysis (Anaerobic Lactic) ATP produced

2 molecules per molecule of glucose

Cellular Respiration (Aerobic) ATP produced

~36 molecules per molecule of glucose

ATP-PC System Duration of activity

10-15 seconds

Glycolysis (Anaerobic Lactic) Duration of activity

15 seconds to 3 minutes

Cellular Respiration (Aerobic) Duration of activity

3 minutes

ATP-PC System Number of chemical reactions

1-2

Glycolysis (Anaerobic Lactic) Number of chemical reactions

~10

Cellular Respiration (Aerobic) Number of chemical reactions

Many (multiple cycles)

ATP-PC System By-products

None

Glycolysis (Anaerobic Lactic) By-products

Lactic acid

Cellular Respiration (Aerobic) By-products

Carbon dioxide

ATP-PC System General activity type

Power surges

Glycolysis (Anaerobic Lactic) General activity type

Intermediate activities/ sprint finish

Cellular Respiration (Aerobic) General activity type

Endurance activities

ATP-PC System Example exercises

Sprints

Glycolysis (Anaerobic Lactic) Example exercises

200-800-metre runs; a shift in hockey

Cellular Respiration (Aerobic) Example exercises

Long-distance running

ATP-PC System Advantages

Very quick surge of power

Glycolysis (Anaerobic Lactic) Advantages

Quick energy without oxygen

Cellular Respiration (Aerobic) Advantages

Sustained energy

ATP-PC System Limitations

Short duration; muscles store small amounts of ATP and creatine phosphate

Glycolysis (Anaerobic Lactic) Limitations

Buildup of lactic acid causes pain and fatigue

Cellular Respiration (Aerobic) Limitations

Requires oxygen