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Enerygy Systems: BTEC Level 3.

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Paul McIntosh

on 6 March 2017

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Transcript of Enerygy Systems: BTEC Level 3.

Describe and explain the 3 different energy systems & their use in sporting activities. P7, M4, D2
ATP is the bodies only usable source of energy
The body then requires energy from an energy system to re-synthesise more ATP if we want to work longer than that
We have enough stored to last for 2 seconds of work
Depending upon the




of exercise the body calls upon 3 different energy systems
ATP-PC energy system
Lactic Acid energy system
Aerobic energy system
Anaerobic high intensity explosive work between 2-10 seconds
Anaerobic medium-high intensity between 10 secs-3 mins
Aerobic low-moderate intensity exercise for long duration
Key points !

1. How much ATP is each energy system able to provide energy for to be re-synthesised?
2. What is the threshold for each system?
3. What is the fuel used in each energy system?
4. Name 2 advantages of each system?
5. Name 2 disadvantages of each system?
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3, 4 & 5 plenary:

You have to tell 3 people, 4 new things that have learnt today in 5 minutes.
1. When is ATP system dominant and why?

2. When would Lactic Acid be dominant and why?

3. When would Aerobic system be dominant and why?

4. Examples when all 3 are being used?
Tasks Checklist:

1. Characteristics of each system. Your systems analysis table is a good start here. Included within these facts should be your advantages/disadvantages.

2. Sporting examples. Which sporting examples can you refer to where each one of the systems is dominant? Can you explain why? Explaining why is the merit aspect of this assignment. Include here your explanation of the sporting examples from our practical lesson.

3. For a distinction you need to be able to analyse the contribution of each system towards the same activity like a team game. By now linking your knowledge of your characteristics can you explain why each system becomes dominant
In 3's: You have 5 minutes!
Divide your page into 3.
2. Lactic Acid
3. Aerobic System
Write down as many key words as you can for each system
Reactions That Break Down The Fuel!

ATP-PC: Phosphocreatine is the fuel

P/C- P + C + Energy: Exothermic reaction.

Energy + ADP + P = ATP: Endothermic reaction.

The breaking down of the fuel gives us energy.
How is the energy in the first reaction used?
How much ATP does it give us per molecule of PC?

This coupled reaction happens due to the presence of the enzyme creatine kinase.

First 2 Seconds:

ATP- ADP + P + Energy!

This release of energy is enough to help us work for 2 seconds.
After that we need an energy system to re-synthesise more ATP.
Lactic Acid System: Glucose is the fuel.

Glucose Pyruvic acid.

This reaction takes place without oxygen and is able to do so through the presence of the enzyme PFK.

What do we get here as a waste product!
It is called anaerobic glycolysis.

How much ATP does it give us per molecule of glucose?
Aerobic Energy System.

There are 3 stages here:

1. Aerobic glycolysis. Like the stage in the lactic acid system, but now we have oxygen, so the glucose is fully broken down. 2 molecules of ATP per molecule of glucose.

2. Krebs Cycle: Here a series of reactions happen where we get CO2 as a waste product and 2 more molecules of ATP.

3. Electron Transport Chain: More reactions where we get H2O as a waste product and now 34 more molecules of ATP.

Remember we also have what else in addition to glucose as our fuel?

Our enzyme is the same as what is was in the lactic acid energy system.
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