Energy System Interplay 2

Lactate Inflection Point can occur when an athlete

• exercises at submaximal intensity.

• fails to improve their lactate tolerance.

• depletes their muscle and liver glycogen stores.

• exceeds their VO2 maximum.

With regard to ATP production, the:

• ATP-PC energy system has the highest yield and slowest rate.

• Anaerobic Glycolysis energy system has the lowest yield and highest rate.

• Aerobic Glycolysis has the highest yield and lowest rate.

• Aerobic Lipolysis has the highest yield and lowest rate.

Which of the following is a situation when anaerobic glycolysis would NOT be the dominant source of energy?

• In a 400 metre race

• In the red blood cells

• When a marathon runner approaches the finish line

• Anaerobic Glycolysis would be dominant in all of the situations above

Which of the following correctly outlines a change that would occur at the commencement of exercise?

• Decreased Lactic Acid

• Increased Inorganic Phosphates (Pi)

• Increased PC stores

• None of the above

Which of the following fuels takes the longest to deplete?

• Intramuscular ATP

• Phosphocreatine (PC)

• Glycogen

• Water

A Centre player for Netball spends 34% of the time working at maximal effort and 66% of the time resting (work to rest ration is 1:2). The Dominant Energy System during work time for the Centre Player is

• The ATP-PC System

• The Anaerobic Glycolysis System

• The Aerobic Energy System

• Both the ATP-PC System and the Anaerobic Glycolysis System

During a 5km run what is the most likely cause of fatigue?

• Depletion of PC

• Accumulation of metabolic by-products such as hydrogen ions

• Depletion of glycogen

• None of the above

The Lactate Inflection Point, or LIP, is:

• The point at which lactate production exceeds removal

• The point beyond which lactate production exceeds removal

• The point after lactate production exceeds removal

• The accumulation of lactate in the blood

Our body uses 3 energy systems to produce ATP—aerobic, anaerobic glycolysis, and ATP-CP. These 3 energy systems are able to generate ATP at different rates as well as different yields. Which of the following statements is true in regards to the rate and yield of ATP production?

• The ATP-PC system has the fastest rate of ATP production, as well as the largest yield relative to the other energy systems.

• Fat metabolised by the aerobic energy system has the slowest rate of ATP production, but can produce the largest yield relative to the anaerobic energy systems

• Anaerobic glycolysis produces more ATP from a glucose molecule than aerobic glycolysis.

• Anaerobic glycolysis has a faster rate of ATP production than the ATP-PC system

A 100-metre runner completes a race in less than 10 seconds. What is the most likely cause of fatigue for this runner?

• depletion of intramuscular glycogen stores

• accumulation of hydrogen ions

• depletion of creatine phosphate stores

• dehydration