OCR A-Level PE - Energy Systems Exam Questions And Answers 100% Pass.
0 view 0 purchase
Course
Energy Systems
Institution
Energy Systems
OCR A-Level PE - Energy Systems Exam
Questions And Answers 100% Pass.
Where do we get energy from for muscular contractions? - AnswerAdenosine Triphosphate
(found in high quantities in carbohydrates)
Where the bonds are broken down to release energy
What enzyme breaks down ATP? - AnswerATPase
...
OCR A-Level PE - Energy Systems Exam
Questions And Answers 100% Pass.
Where do we get energy from for muscular contractions? - Answer✔Adenosine Triphosphate
(found in high quantities in carbohydrates)
Where the bonds are broken down to release energy
What enzyme breaks down ATP? - Answer✔ATPase
Into ADP + Pi
How is re-synthesis of ATP performed? - Answer✔Three chemical reactions within the body.
By food or a chemical called phosphocreatine (PC)
How does the conversion of fuel to energy occur - Answer✔Use of three energy systems
Aerobic system (glycolysis, krebs and etc)
ATP-PC system
Anaerobic glycolytic system
What is the aerobic system? - Answer✔Exercise is at low intensity and oxygen supply high
Glucose is broken down into CO2 and H2O
Oxidation of glucose produces a maximum of 38 ATP
Products of fat and protein digestion are converted to acetyl for entering the krebs
Describe the role of fats in the aerobic system? - Answer✔Fats in the form of fatty acids and
proteins in the form of amino acids are broken down
They are reduced to the acetyl which enters the Krebs cycle
What is glycolysis? - Answer✔A process by which glucose is converted to pyruvate to produce
energy
Describe the process of glycolysis? - Answer✔First stage is anaerobic and takes place in the
sarcoplasm of the muscle cell
Glucose is broken down into pyruvic acid using GPP.
Two molecules of ATP produced
What are the advantages of the aerobic system? - Answer✔More ATP produced 36 ATP
No fatiguing by-products (CO2 and Water)
Lots of glycogen and triglyceride stores so exercise can last for a long period of time
What is phosphocreatine? - Answer✔An energy rich phosphate compound found in the
sarcoplasm of muscle cells
What is the ATP-PC system? - Answer✔Occurs without the presence of oxygen
Provides energy for High intensity, Short duration bouts of exercise
Can be seen in power and strength forms of training.
Can supply energy for 5-8 seconds before complete exhaustion.
Activated at the onset of activity, regardless of intensity
Give an example of when the ATP PC system may be used? - Answer✔8-12 second duration
May last the duration of a sprint, but another energy system must provide energy as PC lasts only
for this duration
Describe how the ATP-PC system works? - Answer✔High ADP stores will trigger release of
creatine kinase
Anaerobic process (breaks down phosphocreatine anaerobically into phosphate and creatine +
energy)
PC needed for providing a high power of contractions
Energy created to convert ADP to ATP a coupled reaction
8-12 second duration
What is the equation in the ATP PC system? - Answer✔PC — Pi + creatine + energy
What are the advantages of the ATP PC system? - Answer✔ATP can be rapidly resynthesised in
the system
Phosphocreatine stores can be resysnthesised quickly (first 30s to 50%, 3 min to 100%)
No fatiguing byproducts
Extend duration of the system through creatine supplementation
Limited phosphocreatine stores in muscle cells (8 second duration)
Only one mole of ATP can be resynthesised for every mole of PC
PC re synthesis can only take place in the presence of o2 (low intensity);
2|Page
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Brightstars. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
