Which of the following is an immediate source of energy for muscle contraction during exercise?

• Stored adenosine triphosphate (ATP)

• Blood glucose

• Glycogen

• Fatty acids

What is the primary function of the ATP-PC system during exercise?

• To provide energy for long-duration activities

• To supply immediate energy for short, explosive movements

• To break down fatty acids for energy

• To transport oxygen to muscles

Which energy system is primarily responsible for providing energy during a 100-metre sprint?

• Aerobic system

• Lactate system

• ATP-PC system

• Fatty acid oxidation

What is the main fuel source for the lactate (anaerobic glycolysis) system?

• Fatty acids

• Blood glucose and muscle glycogen

• Phosphocreatine

• Oxygen

Which of the following processes occurs in the mitochondria during aerobic energy production?

• ATP-PC breakdown

• Anaerobic glycolysis

• Krebs cycle and electron transport chain

• Phosphocreatine resynthesis

Which energy system has the highest ATP yield per molecule of glucose?

• ATP-PC system

• Lactate system

• Creatine phosphate system

• Aerobic system

What is the approximate ATP yield from one molecule of glucose via the aerobic system?

• 2 ATP

• 4 ATP

• 38 ATP

• 1 ATP

The term "energy system continuum" refers to:

• The exclusive use of one energy system at a time

• The sequential use of energy systems depending on exercise intensity and duration

• The breakdown of only fats for energy

• The use of only stored ATP

What does OBLA stand for in exercise physiology?

• Onset of Blood Lactate Accumulation

• Oxygen Balance Level Assessment

• Output of Basal Lactic Acid

• Overload of Blood Lactate Activity

At what point does OBLA typically occur in terms of blood lactate concentration?

• 2 mmol/L

• 4 mmol/L

• 6 mmol/L

• 8 mmol/L