The RER can rise above 1.00 A) during high-intensity exercise. B) if VCO₂ VO₂. C) when the buffering of lactic acid stimulates ventilation to blow off CO₂. D) when all of these occur.

Question

The RER can rise above 1.00 A) during high-intensity exercise. B) if VCO₂ > VO₂. C) when the buffering of lactic acid stimulates ventilation to blow off CO₂. D) when all of these occur.

Quizplus · Accepted Answer

During high-intensity exercise, the body relies more on anaerobic metabolism, leading to an increase in lactic acid production. This increase in lactic acid can stimulate ventilation to blow off CO2, which buffers the acid and prevents a decrease in pH. This leads to a higher respiratory exchange ratio (RER) above 1.00. Additionally, the equation VCO₂ > VO₂ represents the condition where the body is consuming more carbohydrates than fats for energy, which also increases the RER. Therefore, all of these can contribute to a higher RER above 1.00.

The RER Can Rise Above 1.00