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WorksheetsEnergy Systems
Total questions: 16
Worksheet time: 16mins
An athlete was required to complete 5 vertical jumps in 10 seconds.
The results are shown in the table.
These results are consistent with which of the following statements?
The athlete's ATP/PC stores have been depleted and there is insufficient recovery time between attempts
The athlete's glycogen stores have been used up after the second jump, and fatigue has set in
The athlete's level of aerobic endurance is low, and this has resulted in oxygen debt
The athlete's work at maximum effort has caused lactic acid build up, and this has reduced performance
An athlete has been jogging on a treadmill at 65% of aerobic capacity for 45 minutes. If the exercise is continued at the same workload for a further 45 minutes, why would fats rather than carbohydrates be the preferred energy source?
Fat metabolism does not create lactic acid
Fat metabolism is assisted by the body's protein reserves
Fewer chemical reactions are needed to break down fats
Glycogen from carbohydrates would be in limited supply
Why can a physical activity of high intensity and short duration be repeated after a brief recovery period?
Other energy pathways are available for the immediate supply of phosphorus and creatine
Skeletal muscles have sufficient stores of ATP, so less phosphorus and creatine need to be resynthesised
Oxygen is readily available for the recombination of phosphorus and creatine
The recombination of phosphorus and creatine is a rapid chemical process
What is the most appropriate source of fuel for replenishing energy stores after a 50 minute fun run?
Fat
Fibre
Protein
Carbohydrates
What is necessary for the immediate resynthesis of ATP during a long jump event?
Glycogen
Lactic acid
Oxygen
Phosphocreatine
How long would it take for energy system 'Y' to recover from exhaustion following exercise?
1 week
1 - 2 days
2 - 5 minutes
30 minutes - 2 hours
What is necessary for the immediate resynthesis of Adenosine Triphosphate (ATP) during a long-jump event?
Phosphocreatine (PC)
Lactic acid
Glycogen
Oxygen
The graph represents the relationship between running time and energy system contribution.
What is the cause of fatigue of the dominant energy system at 40 seconds running time?
Dehydration
Increased lactic acid
Depletion of glycogen
Depletion of phosphocreatine (PC) stores
In what form are fats stored in the body as a source of fuel?
Cholesterol
Lactic acids
Triglycerides
Creatine phosphate
What is the most effective source of fuel for replenishing energy stores after an athlete has completed an 800m track event?
Fat
Fibre
Protein
Carbohydrate
The graph shows the percentage of energy produced in a variety of activities.
Based on the graph, which of the following statements is the most accurate?
After two seconds no more ATP is created.
Stored energy plays a very small role in a vertical leap test.
The lactic acid system is the major source of energy at the end of a 100-metre sprint.
Aerobic energy is the major source of energy from the 10-second mark in a 400-metre sprint.
What are the waste products of the aerobic energy system?
Lactate, heat, water
Lactate, oxygen, creatine
Carbon dioxide, heat, water
Carbon dioxide, oxygen, creatine
What is the most likely cause of fatigue in a runner completing a 100 m sprint
Dehydration
Accumulation of lactic acid
Depletion of muscle glycogen
Depletion of phosphate creatine
What is the cause of fatigue for the alactacid system?
Lack of essential amino acids
Lack of muscle glycogen stores
Inability to re-synthesise phosphate creatine
Inability to convert carbohydrates to glycogen
What is a common feature of both the alactacid and lactic acid energy systems?
Lactic acid is produced.
ATP is resynthesised anaerobically.
Both systems take the same period of time to recover.
The accumulation of lactic acid in the working muscles causes fatigue.
Which of the following will contribute to fatigue of the aerobic energy system?
An increase of blood glucose and muscle glycogen
An increase in lactic acid and creatine phosphate
A decrease in lactic acid and creatine phosphate
A decrease of blood glucose and muscle glycogen
