Key term
Eduqas A-Level Physical Education A550QS
Health, Fitness and an Active Lifestyle
Short-Term Responses to Exercise
Long-Term Adaptations to Exercise
Fitness Testing and Components of Fitness
Training Methods, Principles and Periodisation
Topic overviewSpecificity, progressive overload, reversibility, variance and FITTContinuous, fartlek, interval and high intensity trainingWeight, plyometric, circuit and flexibility trainingAltitude training and training in hot and cold climatesTraining zones, heart rate monitoring and periodisation
Energy Systems
Fatigue and Recovery
Diet, Nutrition and Supplements
Injury Prevention and Rehabilitation
Joints and the Musculo-Skeletal System
Planes, Axes and Movement Patterns
Biomechanical Principles and Levers
Linear and Angular Motion
Projectile Motion and Fluid Mechanics
Performance Analysis
Technology in Sport
Personality
Attitudes
Goal Setting
Stress, Arousal and Anxiety
Motivation
Aggression
Social Facilitation
Group Dynamics and Leadership
Attribution Theory
Self-Efficacy and Confidence
Skill, Ability and Skill Classification
Learning Curves, Theories and Stages
Transfer, Practice and Guidance
Information Processing, Memory and Feedback
Sport, Culture and Society
The Emergence of Modern Sport
Ethics, Deviance and Doping
Social Differentiation in Sport
Sport and the Mass Media
Commercialisation and Globalisation
Energy Systems
ATP, the ATP-PC system and the lactic acid system
- 3 things to know
- Components 1 and 2
Overview
ATP and its stores, phosphocreatine and the ATP-PC system, its duration, advantages and drawbacks, anaerobic glycolysis and lactic acid, how long the lactic acid system predominates, the events that use each, and how quickly each resynthesises ATP.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Evaluation
For how long does the lactic acid system predominate, and what are its advantages?
Key term
What is the role of ATP in muscle contraction?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is the role of ATP in muscle contraction?
Model answer
ATP, adenosine triphosphate, is the only immediate source of energy for muscle contraction. The breakdown of ATP into ADP and a phosphate releases that energy.
- 2
How long do the muscle's stores of ATP last during maximal exercise?
Model answer
Stored ATP lasts only about 2 to 3 seconds of maximal work. ATP must therefore be resynthesised continuously.
- 3
What is phosphocreatine?
Model answer
Phosphocreatine (PC) is a high-energy compound stored in muscle cells. The breakdown of phosphocreatine releases energy that is used to resynthesise ATP.
- 4
How does the ATP-PC system resynthesise ATP?
Model answer
Phosphocreatine is broken down into creatine and phosphate, releasing energy. The energy is used to rejoin ADP and phosphate to form ATP.
- 5
Where in the muscle cell does the ATP-PC system operate, and does it need oxygen?
Model answer
The ATP-PC system operates in the sarcoplasm of the muscle cell. The system is anaerobic, so no oxygen is needed.
- 6
For how long can the ATP-PC system supply energy during maximal work?
Model answer
The ATP-PC system can supply energy for up to about 10 seconds of maximal work. Phosphocreatine stores are then largely used up.
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