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11 Cards in this Set
- Front
- Back
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What is the Energy Continuum? |
The relative contribution of each energy system to exercise, depending on the intensity and duration. |
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What is the equation for ATP breakdown? |
ATP -----> (using ATPase) ADP + Pi + Energy |
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Explain the breakdown of ATP |
ATP is the only immediately available source of energy. ATPase (enzyme) catalyses breakdown in an exothermic reaction, leaving ADP and Pi. ATP stores last 2-3 seconds and must be resynsthesised after. |
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How long does ATP last before it needs to be resynthesised and how? |
2-3 seconds, by using the same (coupled) reaction: ADP + Pi + Energy-----> ATP |
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Describe the main points of the ATP/PC System |
PC is broken down anaerobically using enzyme CK (creatine kinase). The products Phosphate and Creatine and Energy are left. 1 mole of PC=enough energy to resynthesise 1 mole of ATP. PC stores last from 3-10 secs (100m sprint) |
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What is the formula for the ATP/PC System? |
PC----(Creatine Kinase)----> P + C + Energy |
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Critically Evaluate the ATP/PC Energy System |
+No delay (stores readily available) +Good for high energy movement +No need for Oxygen -Very low ATP yield (1:1) -Only lasts up to 10 secs -Needs time to replenish store |
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Describe the main points of the Glycolytic System |
Glycogen is broken down into Glucose using GPP (enzyme). Glucose is broken down into Pyruvic Acid using PFK. Pyruvic Acid uses LDH to break down into Lactic Acid. This provides the energy to resynthesise 2 ATP. (however lactic acid stops PFK working which=OBLA) Lasts from 10-150 secs (400m) Yield of 1 Glycogen:2 ATP |
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Critically Evaluate the Glycolytic Energy System |
+No delay for Oxygen +High intensity for 10-150secs -Lactic Acid is produced as harmful bi-product (limits PFK and hurts) -Low ATP yield (1:2) |
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Critically Evaluate the Aerobic Energy System |
+Aerobic means no harmful bi-products +Provides a high yield of ATP (1:38) -Takes time to work -Not for high intensity exercise -Needs Oxygen delivery |
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Do the G453 June '10 20 mark question about energy systems |
Mark Scheme |
