Question
Evaluate the correctness of the following statement :
IF A PERSON BREATHES IN AND OUT RAPIDLY FOR SOME TIME ( HYPERVENTILATION ), HIS BODY ALLOWS HIM TO HOLD HIS BREATH FOR A LONGER PERIOD THAN IN THE CASE OF NORMAL VENTILATION ( FOR EXAMPLE WHEN HE IS SUBMERGED IN WATER ) .
Is that due to
(i) Increase in O2 levels in his body
(ii) Decrease level of CO2 in his body at that time ?