Patient Care Technician (PCT) AAH Practice Exam

What is the normal respiratory rate for an adult in breaths per minute?

1. 18-20

2. 12-16

3. 6-10

4. 20-24

The correct answer is: 18-20

The normal respiratory rate for an adult typically falls within the range of 12 to 20 breaths per minute. This range reflects the body's requirement for oxygen exchange and carbon dioxide removal during normal resting conditions. While option A states a range of 18-20, which is at the high end of the normal spectrum, the most widely accepted values include 12-20. This means that while 18-20 can be considered within a normal range in certain contexts, it may not accurately encompass all individuals, especially those at rest. The physiological factors influencing respiratory rates include age, fitness level, body position, and overall health status. In adults, a respiratory rate below or above this normal range could indicate underlying health issues, such as respiratory distress or metabolic conditions. The other options presented fall outside of this general range for normal resting adults: 6-10 is considered bradypneic (abnormally slow), while 20-24 could indicate respiratory distress or hyperventilation.