<prompt> Hyperventilation results in all of the following EXCEPTincreased PCO2decreased cerebral blood flowhypocapniaincreased PO2  <response>: Hyperventilation is initiated due to an increase in PCO2. The increased rate of breathing blows off excess CO2. Thus, hyperventilation results in a decrease of PCO2 to its normal physiologic range. The increased respiratory rate causes a PO2.The resultant decrease in CO2 causes hypocapnia.The resultant decrease in PCO2 causes vasoconstriction, leading to cerebral blood flow.Respiratory alkalosis occurs due to the pH. 