Which of the following is not true of respiratory alkalosis?
A)It exists when the blood pH is 7.45.
B)It can result from an increase in the CO₂ level in the blood.
C)It can result in death, if the blood pH reaches 8.0 or above.
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.

Question

Which of the following is not true of respiratory alkalosis?
A)It exists when the blood pH is >7.45.
B)It can result from an increase in the CO₂ level in the blood. 
C)It can result in death, if the blood pH reaches 8.0 or above.
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.

Quizplus · Accepted Answer

Respiratory alkalosis occurs when there is a decrease in the partial pressure of carbon dioxide in the blood, leading to an increase in blood pH. Thus, choice B is not true as it describes an increase rather than a decrease in CO₂ levels that would cause respiratory alkalosis. The other options (A, C, and D) are all true of respiratory alkalosis.

Which of the Following Is Not True of Respiratory Alkalosis