§-Quick questions
VICPhysical EducationUnit 3: Movement Skills and Energy for Physical Activity
Quick questions on Energy systems for VCE Physical Education Unit 3
4short 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 the anaerobic glycolysis (lactic acid) system?Show answer
Glucose is broken down anaerobically through glycolysis. The end-product, lactate, dissociates into lactate and hydrogen ions. Hydrogen ions lower muscle pH and eventually impair contraction.
What is q1?Show answer
Name the three energy systems and state the primary fuel each uses. [3 marks]
What is q2?Show answer
Explain why the accumulation of hydrogen ions, rather than lactate, is described as the cause of fatigue in the anaerobic glycolysis system. [3 marks]
What is q3?Show answer
A 200m sprinter completes the race in about 22 seconds. (a) Identify the two systems contributing most to the energy supply. (b) Explain how their contributions change across the race.
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