Physiology Questions A2 PE
ENERGY SYSTEMS
Figure 1 shows a sprint cycle race. This activity involves cycling four laps of a
250 metre track, with the final lap being completed as fast as possible. Elite performers cover the final lap in times of between 10 and 11 seconds.
(a) Name the main energy system being used in the final sprint to the finishing line and explain how this system provides energy for the working muscles. (4 marks)
(b) At the end of the race, the cyclist will be out of breath and will continue to breathe heavily even though they have come to a complete rest. Explain why this breathlessness occurs. (4 marks)
ENERGY SOURCES
The triathlon is an athletic event that involves performers undertaking a long distance swim, immediately followed by a cycle race and then finally a run of several kilometres.
(a) What would be the major energy sources used by a triathlete? (3 marks)
(b) Briefly explain how these energy sources are used for regeneration of ATP.
(5 marks)
ENERGY SYSTEMS 2 QUESTION
Explain how the majority of energy required by an athlete in a 1500 metre race is produced. (4 marks)
ENERGY SYSTEMS / FATIGUE
Elite swimmers can complete a 200 metres free-style race in just under 2 minutes.
(a) (i) Describe how the majority of energy will be produced for this type of race.
(4 marks)
(ii) Explain the main cause of muscle fatigue during this type of race. (2 marks)
(iii) Describe how the main cause of this muscle fatigue is removed from the body after the race. (4 marks)
MARK SCHEME ENERGY STYSTEMS
1. (a) 1. ATP-PC/ system/phosphocreatine system/alactic system; Sub max 1 mark
2. PC stored in muscles; Sub max 3 marks
3. PC = C + P(i) + energy/creatine + phosphate;
4. Energy used for ATP resynthesis;
5. ADP + P + energy = ATP/ADP + PC = ATP + C;
6. ATP broken down into ADP + P(i) + energy;
7. Anaerobic/no O2;
8. Glycolosis;
9. Lactate/lactate acid; Max 4 marks
(b) 1. EPOC/Excess Post Oxygen Consumption; (Do not credit O2 debt/deficit);
2. Aerobic energy
Figure 1 shows a sprint cycle race. This activity involves cycling four laps of a
250 metre track, with the final lap being completed as fast as possible. Elite performers cover the final lap in times of between 10 and 11 seconds.
(a) Name the main energy system being used in the final sprint to the finishing line and explain how this system provides energy for the working muscles. (4 marks)
(b) At the end of the race, the cyclist will be out of breath and will continue to breathe heavily even though they have come to a complete rest. Explain why this breathlessness occurs. (4 marks)
ENERGY SOURCES
The triathlon is an athletic event that involves performers undertaking a long distance swim, immediately followed by a cycle race and then finally a run of several kilometres.
(a) What would be the major energy sources used by a triathlete? (3 marks)
(b) Briefly explain how these energy sources are used for regeneration of ATP.
(5 marks)
ENERGY SYSTEMS 2 QUESTION
Explain how the majority of energy required by an athlete in a 1500 metre race is produced. (4 marks)
ENERGY SYSTEMS / FATIGUE
Elite swimmers can complete a 200 metres free-style race in just under 2 minutes.
(a) (i) Describe how the majority of energy will be produced for this type of race.
(4 marks)
(ii) Explain the main cause of muscle fatigue during this type of race. (2 marks)
(iii) Describe how the main cause of this muscle fatigue is removed from the body after the race. (4 marks)
MARK SCHEME ENERGY STYSTEMS
1. (a) 1. ATP-PC/ system/phosphocreatine system/alactic system; Sub max 1 mark
2. PC stored in muscles; Sub max 3 marks
3. PC = C + P(i) + energy/creatine + phosphate;
4. Energy used for ATP resynthesis;
5. ADP + P + energy = ATP/ADP + PC = ATP + C;
6. ATP broken down into ADP + P(i) + energy;
7. Anaerobic/no O2;
8. Glycolosis;
9. Lactate/lactate acid; Max 4 marks
(b) 1. EPOC/Excess Post Oxygen Consumption; (Do not credit O2 debt/deficit);
2. Aerobic energy