Hyperventilation results in all of the following EXCEPT
increased PCO2
decreased cerebral blood flow
hypocapnia
increased PO2
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.