Outline how ventilation rate responds to moderate aerobic exercise. (3 marks)
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- Ventilation rate increases from resting levels during moderate aerobic exercise. Breathing frequency approximately doubles from baseline values.
- The immediate physiological response supplies additional oxygen to working muscles. Deeper breaths also contribute to increased oxygen intake.
- Carbon dioxide removal is enhanced during exercise. Increased ventilation clears metabolic waste products from energy production.
- The response stabilises at a sustainable level during steady-state exercise. Recovery sees gradual return to resting ventilation rates.
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Sample Answer
- Ventilation rate increases from resting levels during moderate aerobic exercise. Breathing frequency approximately doubles from baseline values.
- The immediate physiological response supplies additional oxygen to working muscles. Deeper breaths also contribute to increased oxygen intake.
- Carbon dioxide removal is enhanced during exercise. Increased ventilation clears metabolic waste products from energy production.
- The response stabilises at a sustainable level during steady-state exercise. Recovery sees gradual return to resting ventilation rates.