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WorksheetsENERGY SYSTEMS Quiz
Total questions: 62
Worksheet time: 31mins
What is Adenosine Triphosphate (ATP)?
A type of cell in the muscles
A chemical compound that provides energy to cells
A protein that helps with digestion
A hormone that regulates metabolism
What happens when the chemical bond of one of the phosphates in ATP is broken?
A new cell is created
Energy is absorbed
Energy is released
ATP is resynthesized
How long is the small amount of ATP available for use at any given time?
10-20 seconds
1-2 minutes
1-2 hours
1-2 seconds
What are the remaining components after energy is released from ATP?
ATP and Pi
ADP and Pi
ADP and ATP
Pi and energy
Which of the following is NOT a function of carbohydrates?
Providing fuel for aerobic and anaerobic glycolysis
Being transported in the blood as glucose
Being the main fuel source at rest and low intensity activity
Being stored as glycogen
According to the learning material, what are fats primarily used for?
Growth and repair
Aerobic glycolysis
Main fuel source at rest and low intensity activity
Preferred source of fuel
Which of the following is NOT listed as a source of carbohydrates in the learning material?
Bread
Cheese
Pasta
Rice
What is the primary use of protein as stated in the learning material?
To provide energy for muscle contraction
To refuel the body
For growth and repair
As the body's preferred source of fuel
Where is glycogen primarily stored in the body?
In the liver and kidneys
In the muscle and liver
In the adipose tissue and liver
In the muscle and heart
Which substance is stored in the muscles and the adipose tissue?
Glycogen
Protein
Fats (triglycerides)
Glucose
Where is creatine produced in the body?
In the kidneys from the breakdown of proteins
In the liver from the breakdown of amino acids
In the muscles from the breakdown of carbohydrates
In the pancreas from the breakdown of fats
What is the role of glycogen in high intensity activity?
It is broken down to Free Fatty Acids for energy.
It assists in high intensity efforts through anaerobic glycolysis.
It is not really considered in a sporting context.
It is utilized more at low intensity and longer duration exercise.
What is the primary energy store for fats during physical activity?
Amino acids
Glycogen
Triglycerides
Proteins
During what type of exercise are fats utilized more?
High intensity and short duration exercise
Low intensity and longer duration exercise
Only during anaerobic activities
Only during aerobic activities
What does the body use as a mixture to supply the muscles with ATP during prolonged endurance activities like marathons or triathlons?
Proteins and amino acids
Carbohydrates and fats
Vitamins and minerals
Water and electrolytes
According to the 'crossover concept', what happens to fat usage at lower exercise intensities?
It decreases
It stays the same
It increases
It is not used at all
Why are low Glycaemic Index (GI) foods often preferred by athletes?
They are absorbed quickly and increase energy levels instantly
They are high in glucose and improve performance immediately
They are high in fibre and release energy gradually
They have no impact on insulin levels or energy release
What is the purpose of carbohydrate loading before an endurance event?
To decrease the storage of glycogen and improve performance
To increase the storage of glycogen and have a negative impact on performance
To increase the storage of glycogen and provide a positive impact on performance
To reduce the need for a high carb diet during the endurance event
What is glycogen sparing and how does it benefit athletes during an event?
It occurs when the body uses glycogen instead of fats, saving energy for later in the event
It is the process of using fats over glycogen in the early stages of an event, resulting in a greater ATP yield from fats
It happens when the body stops using glycogen altogether to conserve energy
It is the breakdown of glycogen at lower intensities to save fats for later in the event
What is the main energy system at a given time during exercise known as?
Auxiliary system
Predominant system
Secondary system
Sole system
Which of the following is a factor in determining the predominant energy system?
Fuel storage/depletion
Color of exercise equipment
Time of day when exercise is performed
The brand of clothing worn during exercise
What type of exercise is considered when determining the predominant energy system?
Continuous or intermittent
Indoor or outdoor
Solo or team
High-altitude or sea-level
What does PC split into during the CP-ATP system process?
Glucose and oxygen
Creatine and Pi
ATP and ADP
Lactic acid and hydrogen ions
How long does the CP-ATP system supply ATP during intense exercise?
30-60 seconds
7-10 seconds
1-2 minutes
15-20 seconds
What is the ATP yield per molecule of CP in the CP-ATP system?
2
1
3
0.5
When can replenishment of the CP-ATP system only occur?
During intense exercise
At rest
While eating
During light exercise
How much time does it take for the CP-ATP system to be fully replenished?
1-2 minutes
3-5 minutes
10-15 minutes
20-30 minutes
What percentage of the CP-ATP system is replenished within 30 seconds?
25%
50%
75%
98%
What other names can the CP-ATP system be referred to as?
Glycolytic system, Lactic acid system
Oxidative system, Aerobic system
Phosphagen system, ATP-PC
Citric acid cycle, Krebs cycle
What does anaerobic glycolysis refer to in the context of physical exercise?
The complete breakdown of glucose when oxygen is plentiful
The incomplete breakdown of glucose when oxygen is unavailable
The process of converting lactic acid to glucose
The use of oxygen to produce ATP during exercise
How does the speed of ATP supply in anaerobic glycolysis compare to the CP-ATP system?
It is faster because it has more complex chemical reactions
It is slower because it has more complex chemical reactions
It is faster because it uses oxygen
It is the same speed as the CP-ATP system
How long does it take for fatigue to set in during maximal exercise due to anaerobic glycolysis?
1-2 minutes
2-3 minutes
3-4 minutes
4-5 minutes
What is the ATP yield from anaerobic glycolysis?
(a)
What is the main limiting factor in muscle contraction during anaerobic glycolysis?
Oxygen availability
Glucose availability
The inhibitory effect of H+ (hydrogen ions)
The production of ATP
What is required to convert ADP (Adenosine Diphosphate) back into ATP (Adenosine Triphosphate)?
Glucose
Lactic acid
Inorganic phosphate (Pi)
Glycogen
During the breakdown of glycogen, what is the immediate molecule that is formed before it is further processed into pyruvic acid or lactic acid?
ATP
Lactic acid
Pyruvic acid
Glucose
What does LIP stand for in the context of physical education?
Lactic Inflection Point
Lactate Inflection Point
Lactic Inflexion Point
Lactate Influx Point
What happens at the lactate inflection point (LIP)?
The body can no longer prevent the accumulation of H+ ions.
The body can prevent the accumulation of H+ ions.
Lactic acid production is slower than lactate removal.
Lactic acid is not produced at all.
What is known as maximal lactate steady state (MLSS)?
The point where lactate production is minimal and removal is maximal.
The point where lactate production is maximal and removal is minimal.
The point where lactate production is matched by maximal lactate removal.
The point where lactate production exceeds lactate removal significantly.
What occurs at intensities higher than the lactate inflection point?
Lactic acid is produced slower than it can be oxidised, and lactate and H+ ions decrease in the muscle and the bloodstream.
Lactic acid is produced at the same rate it can be oxidised, and lactate and H+ ions remain stable in the muscle and the bloodstream.
Lactic acid is produced faster than it can be oxidised, and lactate and H+ ions accumulate in the muscle and the bloodstream.
Lactic acid production stops completely, and lactate and H+ ions are fully removed from the muscle and the bloodstream.
What is the consequence of exercising at intensities higher than the lactate inflection point?
The individual will be able to maintain this intensity for a long duration.
The individual will not be able to maintain this intensity for long.
The individual will experience a decrease in muscle performance.
The individual will not experience any significant physiological changes.
What is aerobic glycolysis?
The partial breakdown of glucose without oxygen
The complete breakdown of glucose when sufficient oxygen is available
The process of converting glycogen into glucose
The breakdown of fatty acids without oxygen
When fats are utilized in the aerobic system, the process is referred to as:
Glycogenolysis
Aerobic lipolysis
Anaerobic glycolysis
Oxidative phosphorylation
Which energy system is considered the slowest due to the involvement of many complex chemical reactions?
Anaerobic system
Phosphagen system
Aerobic system
Glycolytic system
How long may it take for oxygen to be available at the muscle site in the aerobic system?
30 seconds
60 seconds
90 seconds
120 seconds
Which substrate is preferentially utilized at higher intensities in the aerobic system for greater efficiency?
Proteins
Fats
Glycogen
Amino acids
What is the ATP yield from glycogen and FFAs (Free Fatty Acids) in the aerobic system?
Glycogen = 38, FFAs = 147
Glycogen = 147, FFAs = 38
Glycogen = 2, FFAs = 38
Glycogen = 38, FFAs = 2
Which of the following are produced in the aerobic system but are not limiting factors?
Lactic acid, heat & H2O
ATP, CO2 & heat
CO2, heat & H2O
Glucose, CO2 & lactic acid
Which energy system is predominant in maximal short duration activities?
Aerobic system
Anaerobic glycolysis
CP-ATP system
All systems equally
During periods of oxygen deficit, which energy systems play a major role?
Aerobic system
CP-ATP system
Anaerobic systems
All systems equally
At what intensity is the aerobic system predominant?
Maximal short duration activity
Intense activity less than 1 minute
Sub-maximal intensity
Intermittent activity
When does the aerobic system become predominant in continuous activity?
Immediately from the start
After about the 1 minute mark
Only during the recovery periods
It is always predominant
Why does the contribution from the anaerobic systems increase during intermittent activity?
Because of the constant high intensity
Due to the lack of oxygen supply
The rest periods allow them to recover
Anaerobic systems are always active
Which energy system is primarily used at rest?
ATP-PC energy system
Anaerobic glycolysis energy system
Aerobic energy system
None of the above
Which energy system has a total duration of activity lasting 0-10 seconds?
ATP-PC energy system
Anaerobic glycolysis energy system
Aerobic energy system
All of the above
During high-intensity activity, which energy system is used for increases in intensity during long duration events when PC has not restored?
ATP-PC energy system
Anaerobic glycolysis energy system
Aerobic energy system
None of the above
What is oxygen deficit in the context of physical activity?
The amount of oxygen the body can store during rest
The point at which the body stops using oxygen during exercise
The situation where the oxygen demand by the muscles exceeds the oxygen supply from the cardiorespiratory system
The increase in oxygen supply to the muscles during high-intensity exercise
Why does oxygen deficit occur during physical activity?
Because the muscles do not need oxygen during intense exercise
Because the body's respiratory and cardiovascular systems can supply O2 more quickly than it is consumed
Because the body's respiratory and cardiovascular systems cannot supply O2 quickly enough
Because the anaerobic energy systems do not function during exercise
When does oxygen deficit typically occur?
When the intensity of exercise decreases
During the cool-down phase of exercise
Whenever the intensity of exercise increases rapidly, such as at the start of exercise or during a surge or sprint finish
When the body is at rest before starting exercise
What occurs during the steady state of exercise?
The oxygen supply cannot meet the oxygen demand
The oxygen demand is met by the oxygen supply
The body stops consuming oxygen
The body's systems fail to deliver oxygen to the muscles
How does aerobic training affect the time it takes to reach steady state in fitter athletes?
It has no effect on the time to reach steady state
It lengthens the time to reach steady state
It shortens the oxygen deficit period, reaching steady state quicker
It increases the oxygen deficit period
On an oxygen consumption graph, how is steady state identified?
As a sharp peak
As a rapid decline
As a plateau
As a fluctuating line
