Question

multiple choice question

which of the following accumulates during muscle fatigue?

• creatine phosphate
• atp breakdown products
• oxygen
• pyruvic acid

Explanation:

Analyze the physiological changes during muscle fatigue

Using the Muscle Fatigue knowledge point

During prolonged or intense muscle contraction, the rate of ATP utilization exceeds its production. This state of Muscle Fatigue is characterized by several metabolic changes:

• Creatine phosphate levels decrease as it is used to rapidly regenerate ATP.
• Oxygen levels decrease, leading to anaerobic metabolism.
• Pyruvic acid is converted into lactic acid rather than accumulating directly.
• ATP is broken down into ADP, inorganic phosphate (\(\text{P}_i\)), and hydrogen ions (\(\text{H}^+\)). These ATP breakdown products accumulate in the muscle fibers and contribute significantly to the sensation and physiological state of fatigue.

Evaluate the given options

Using the Muscle Fatigue knowledge point

• Creatine phosphate: Decreases during fatigue.
• ATP breakdown products: Accumulate during fatigue.
• Oxygen: Decreases during fatigue.
• Pyruvic acid: Converted to lactic acid, so it does not accumulate in its original form.

Therefore, the correct option is ATP breakdown products.

Answer:

• Creatine phosphate
• ATP breakdown products (Correct answer)
• Oxygen
• Pyruvic acid