8 Causes of Fatigue

Which of the following is a primary cause of fatigue during intense physical activity?

• Depletion of energy sources such as ATP and glycogen

• Increase in oxygen supply

• Decrease in body temperature

• Increase in muscle mass

What waste product is commonly associated with muscle fatigue due to anaerobic respiration?

• Oxygen

• Lactate

• Glucose

• Glycogen

Which neurotransmitter's depletion can contribute to fatigue during prolonged exercise?

• Dopamine

• Serotonin

• Acetylcholine

• Adrenaline

Which of the following is NOT an energy source that, when depleted, leads to fatigue?

• ATP

• Phosphagen

• Carbon dioxide

• Glycogen

During high-intensity exercise, which molecule is rapidly used up, leading to quick fatigue?

• ATP

• Lactate

• Carbon dioxide

• Acetylcholine

Which of the following accumulates in muscles and contributes to the sensation of fatigue?

• Oxygen

• Lactate

• Glucose

• Phosphagen

What is the main role of acetylcholine in muscle contraction?

• Providing energy

• Storing glycogen

• Removing waste products

• Acting as a neurotransmitter at the neuromuscular junction

Which of the following is a direct result of the depletion of glycogen stores in muscles?

• Increased muscle strength

• Onset of fatigue

• Decreased carbon dioxide production

• Enhanced oxygen uptake

Which waste product is produced in greater amounts during anaerobic exercise and contributes to fatigue?

• Water

• Carbon dioxide

• Lactate

• Glucose

Which of the following is NOT a cause of fatigue?

• Depletion of acetylcholine

• Accumulation of carbon dioxide

• Depletion of ATP

• Increase in glycogen stores