Which of the following can cause respiratory alkalosis?

Respiratory alkalosis occurs when there is a decrease in carbon dioxide levels in the blood, leading to an increase in blood pH. High fever can contribute to respiratory alkalosis as it typically increases the metabolic rate and may lead to hyperventilation, where the body expels carbon dioxide at a faster rate than it is produced. This can result in a state of alkalosis due to the lower concentration of carbon dioxide in the bloodstream.

Additionally, while conditions like hypoventilation, sepsis, and respiratory failure generally lead to respiratory acidosis by retaining carbon dioxide, high fever specifically can trigger increased respiratory drive and decreased carbon dioxide levels, making it a common cause of respiratory alkalosis in certain patient populations.