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Questions and Answers
What is primarily used by the aerobic system to produce energy?
What is primarily used by the aerobic system to produce energy?
The aerobic system produces more energy than the anaerobic system in a shorter amount of time.
The aerobic system produces more energy than the anaerobic system in a shorter amount of time.
False (B)
What process converts pyruvic acid into glucose during recovery?
What process converts pyruvic acid into glucose during recovery?
Glycolysis
The _____ cycle involves the conversion of lactic acid into glycogen in the liver.
The _____ cycle involves the conversion of lactic acid into glycogen in the liver.
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Match the components of the aerobic energy system with their functions:
Match the components of the aerobic energy system with their functions:
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What is a major disadvantage of the ATP-PC system?
What is a major disadvantage of the ATP-PC system?
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The lactic acid system produces more ATP than the ATP-PC system.
The lactic acid system produces more ATP than the ATP-PC system.
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What is the main enzyme involved in the conversion of pyruvic acid to lactic acid?
What is the main enzyme involved in the conversion of pyruvic acid to lactic acid?
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The __________ system begins with anaerobic glycolysis and produces lactic acid during high-intensity exercise.
The __________ system begins with anaerobic glycolysis and produces lactic acid during high-intensity exercise.
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Match the following energy systems with their characteristics:
Match the following energy systems with their characteristics:
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Flashcards
ATP-PC System
ATP-PC System
An energy system that quickly produces ATP using phosphocreatine (PC) stored in muscles. It's anaerobic and provides immediate energy for short bursts of activity.
Lactic Acid System
Lactic Acid System
An anaerobic energy system that breaks down glycogen to produce ATP, converting pyruvic acid to lactic acid when oxygen is insufficient.
Anaerobic Glycolysis
Anaerobic Glycolysis
The process that occurs in the lactic acid system, where glycogen is broken down into pyruvic acid without oxygen.
Phosphocreatine (PC)
Phosphocreatine (PC)
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Lactic Acid
Lactic Acid
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EPOC Slow Component
EPOC Slow Component
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EPOC Fast Component
EPOC Fast Component
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Aerobic System Stages
Aerobic System Stages
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Aerobic Energy Production
Aerobic Energy Production
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Marathon Energy Source
Marathon Energy Source
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Study Notes
Energy Systems
- Energy is the ability to do work
- Energy systems convert food into ATP (adenosine triphosphate)
- ATP is the only form of energy cells can use
ATP-PC System
- Used for short, powerful bursts of exercise
- Duration: less than 10 seconds
- High intensity activities, e.g. 100-meter sprint
- Uses stored phosphocreatine (PC) to regenerate ATP
- Ratio of 1:1, meaning 1 PC molecule produces 1 ATP molecule
- Limited PC stores, thus the system's short duration
- Few chemical reactions involved
Lactic Acid System
- Used for medium-length exercise, high intensity
- Duration: 30 seconds to 3 minutes
- Activities such as weightlifting, circuit training, and the 400-meter race
- Glycogen is broken down into pyruvic acid, which converts to lactic acid due to insufficient oxygen
- Generates ATP quickly, however, lactic acid buildup causes fatigue
- Inhibits enzyme function
Aerobic System
- Used for long-distance exercises, low intensity
- Duration: 3 minutes to indefinitely
- Activities such as marathons, swimming, and cycling
- Breaks down glycogen, glucose, and fats using oxygen
- Completes the breakdown of one molecule of glucose into H2O and CO2 through three stages:
- Glycolysis
- Krebs cycle
- Electron transport chain
- Unlimited energy production (with oxygen)
- Slower to start producing energy
- No harmful byproducts
Energy Source Breakdown
- Carbohydrates (glucose): stored as glycogen in muscles and liver
- Fats (free fatty acids): broken down for energy
- Protein: used as a secondary energy source during prolonged exercise
Energy Continuum
- The specific energy system utilized depends on the intensity and duration of the exercise.
- Low-intensity, long-duration exercise relies mostly on the aerobic system.
- High-intensity, short-duration exercise relies primarily on the ATP-PC and lactic acid systems.
Energy Continuum - EPOC
- When exercise stops, the body continues to consume more oxygen than at rest. This is called Excess Post-exercise Oxygen Consumption (EPOC)
- Two components include: fast and slow
- Fast component: rapid resynthesis of phosphocreatine
- Slow component: removal of lactic acid through the conversion to glucose or through the Cori cycle.
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Description
This quiz explores various energy systems used during physical activities, including the ATP-PC system, lactic acid system, and aerobic system. Understand how each system functions, their duration, and their applications in different types of exercises. Test your knowledge about the processes that fuel our body's movement.
