Complete the table by identifying the features of each energy system - HSC - SSCE Personal Development and Physical Education - Question 22 - 2009 - Paper 1
Question 22
Complete the table by identifying the features of each energy system.
| Features | Alactacid (ATP/PC) system | Aerobic system |
|----------|------------------------... show full transcript
Worked Solution & Example Answer:Complete the table by identifying the features of each energy system - HSC - SSCE Personal Development and Physical Education - Question 22 - 2009 - Paper 1
Step 1
Source of fuel
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Answer
The primary source of fuel for the Alactacid system is adenosine triphosphate (ATP) and phosphocreatine (PC), which are stored in the muscles. The aerobic system primarily utilizes carbohydrates and fats as fuel sources, metabolizing them in the presence of oxygen.
Step 2
Duration of the system
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The Alactacid system is effective for very short bursts of high-intensity activity, typically lasting up to 10 seconds. The aerobic system is suited for longer duration activities, sustaining energy output for several minutes to hours, depending on fitness levels.
Step 3
By-products
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The by-products of the Alactacid system are minimal, primarily consisting of inorganic phosphate and heat. The primary by-products of the aerobic system are carbon dioxide and water, produced during the metabolic process.
Step 4
Recovery rate
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Recovery from heavy Alactacid activity can occur rapidly within a few minutes, as ATP and PC stores are replenished quickly. Recovery from aerobic work is generally slower, as it depends on the depletion of glycogen stores and requires ongoing oxygen supply for replenishment.
Step 5
Specific sporting example where the energy system is dominant
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Sports such as sprinting and weightlifting where short, explosive actions are vital primarily utilize the Alactacid system. Endurance sports like long-distance running and cycling primarily rely on the aerobic system for energy.
