A Pulmonary function test

A 55-year-old man is taking a pulmonary function test. He is asked to breathe as fast and as deep as he can for 2 seconds while an electronic spirometer measures his ventilation and reports it as maximum voluntary ventilation. Which of the following principles should be used to predict a person’s PaCO2 at the end of the maximum voluntary ventilation test.?

(A) PaCO2 decreases but disproportionately to the decreased ventilation

(B) PaCO2 decreases in proportion to the increased ventilation

(C) PaCO2 increases but disproportionately to the decreased ventilation

(D) PaCO2 increases in proportion to the decreased ventilation

(E) PaCO2 remains the same