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Energy Systems: OCR Physical Education A2 Exam Questions And Answers 100% Pass
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Energy Systems: OCR Physical Education A2 Exam Questions And Answers 100% Pass. What is ATP? - Answeradenosine triphosphate, chemical energy stored as a high energy compound in the body, immediate useable source what is energy? - Answerability to perform work or put mass into motion (J) what ...

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  • January 14, 2025
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • energy systems ocr physical education a2 exam que

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  • Energy Systems
  • Energy Systems

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Energy Systems: OCR Physical Education
A2 Exam Questions And Answers 100%
Pass.


What is ATP? - Answer✔adenosine triphosphate, chemical energy stored as a high energy
compound in the body, immediate useable source
what is energy? - Answer✔ability to perform work or put mass into motion (J)

what is work? - Answer✔ability to apple force over a distance (J) or (newtons N)
W= force X distance
what is power? - Answer✔rate at which we can work/
P= force X distance / by time (Watts)
what is an exothermic reaction? - Answer✔energy is released - ATP --> ADP+Pi+energy
what is an endothermic reaction? - Answer✔energy is required for its process - ADP+Pi --> ATP

what is a coupled reaction? - Answer✔linked reaction, products from one reaction e.g. energy
are used for another reaction
e.g. energy from breakdown of PC is used for resynthesis of ATP
PC --> C-energy-P
energy + ADP + Pi --> ATP
why does breakdown of PC release energy? - Answer✔held together by high energy bonds
role of ATP? - Answer✔only usable form of energy in the body, high energy phosphate
compound, reversible reaction, facilitating enzyme is ATPase so can apply force as kinetic
energy
what is the ATP/PC system? - Answer✔anaerobic, uses ATP and PC, occurs in muscle cell
sarcoplasm, ATPase and creatine Kinase are controlling enzymes, PC --> C + Pi = energy, P and
C are by-products, 1ATP yielded
what is LA system? - Answer✔anaerobic glycolysis, uses glycogen and glucose, in muscle cell
sarcoplasm

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, ©BRIGHSTARS 2024/2025 ALL RIGHTS RESERVED.

glycogen --> glucose (glycogen phosphorylase)
glucose --> pyruvate + energy ( PFK)
pyruvate --> lactic acid (LDA)
LA is by-product, low pH, inhibits enzymes, 2 ATP yielded
what is aerobic system? - Answer✔aerobic glycolysis, krebs cycle, ETC
what is aerobic glycolysis? - Answer✔glycogen/glucose/FFAs in muscle cell sarcoplasm
Glycogen --> glucose (glycogen phosphorylase)
glucose --> pyruvate + energy (PFK)
pyruvate + CoA --> acetylCoA
2 ATP yielded
what is krebs cycle? - Answer✔occurs in mitochondria matrix, uses lipases + fats
acetylCoA + oxaloscetic acid --> citric acid +o2
--> CO2 (by-product) + H + energy
2 ATP yielded
what is ETC? - Answer✔occurs in mitochondria cristae
H + o2 = H20 + energy
electrons travel down ETC producing energy for H atoms to diffuse against their conc. gradient,
they then push through an ATPase pump and yield ATP
34 ATP yielded
advantaged of ATP/PC system? - Answer✔doenst need o2, Pc stored in muscle cell so readily
available energy source, provides energy for high intensity exercise and movements, no fatiguing
by-products, PC can be quickly resynthesised so quick recovery time
disadvantages of ATP/PC system? - Answer✔only small amounts of ATP and PC stroed in
muscle cells, 1:1 ATP lasts 8-10s
training adaptations to ATP/PC system? - Answer✔anaerobic training overloads ATP/PC
system, increases bodys muscle stores of ATP and PC, delays threshold between ATP/PC system
and LA system, increases potential durations of high intensity exercise for up to 1-2s
advantages of LA system? - Answer✔large glycogen store in muscles and liver so readily
available as potential energy source, resynthesises 2ATP, fewer reactions than aerobic, provides
energy for high intensity exercise lasting between 10 and 180s, can work aerobically as well as
anaerobically



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