Which of the following is not true of respiratory alkalosis?
A. It can result in death, if the blood pH reaches 8.0 or above.
B. It can result from an increase in the CO2 level in the blood.
C. It exists when the blood pH is >7.45.
D. It causes vasoconstriction of the cerebral blood vessels, which decreases oxygen delivery to the brain.
E. All of these are true of respiratory alkalosis.
Answer: B
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