AEMCA Practice Exam

What is the pH level indicating respiratory alkalosis?

1. Below 7.35

2. Between 7.35 - 7.45

3. At 7.45

4. Above 7.45

The correct answer is: Above 7.45

Respiratory alkalosis is characterized by an increase in blood pH due to hyperventilation, which causes a decrease in carbon dioxide levels in the blood. This elevated pH level is typically above 7.45. A pH above 7.45 indicates that the blood is becoming more alkaline, which aligns with the physiological changes seen in respiratory alkalosis. The normal pH range for human blood is approximately 7.35 to 7.45, and pH levels above this range signify alkalosis. Understanding the balance of acid-base in the body is crucial, as it helps in diagnosing various medical conditions. In contrast, a pH below 7.35 would suggest acidosis, while a pH between 7.35 and 7.45 falls within the normal range, indicating no disturbance in the acid-base balance. A pH at exactly 7.45 does not indicate alkalosis but rather the upper limit of normality. Thus, only a pH above 7.45 clearly points to respiratory alkalosis.