Back to the full dot-point answer
WalesPhysical EducationQuick questions
Unit 1: Exercise Physiology, Performance Analysis and Training
Quick questions on Energy systems and recovery - WJEC A-Level Physical Education
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is aTP-PC system?Show answer
Phosphocreatine (PC) stored in muscle is broken down by creatine kinase, releasing energy to rejoin ADP and a phosphate into ATP. It is very fast and anaerobic, with no lactate produced, but the PC store lasts only about 8 to 10 seconds. It dominates in explosive actions such as a jump or short sprint.
What is anaerobic glycolytic system?Show answer
Glycogen is broken down to glucose and then, in glycolysis, to pyruvate. Without sufficient oxygen, pyruvate is converted to lactate. This releases energy anaerobically for a net yield of 2 ATP per glucose.
What is aerobic system?Show answer
With enough oxygen, glucose and fats are fully broken down through glycolysis, the Krebs cycle and the electron transport chain, producing carbon dioxide and water and a large yield of up to 38 ATP per glucose molecule. It has no fatiguing by-product, so it powers prolonged, lower-intensity exercise such as a marathon, but it is comparatively slow to produce ATP.
What is q1?Show answer
Name the fuel and the by-product of the anaerobic glycolytic system. [2 marks]
What is q2?Show answer
Explain why the ATP-PC system can only supply energy for a short time. [2 marks]
What is q3?Show answer
Describe the two components of EPOC and what each restores. [4 marks]
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.