The primary factor believed to be responsible for stimulating the profound and abrupt increase in ventilation during exercise is increased arterial PCO₂.

Question

Quizplus · Accepted Answer

The primary factor responsible for stimulating increased ventilation during exercise is actually increased metabolic demand and levels of carbon dioxide, which leads to a decrease in blood pH and an increase in arterial PCO₂. However, it is the decrease in blood pH that plays the key role in stimulating ventilation.

The Primary Factor Believed to Be Responsible for Stimulating the Profound