Certified Transport Registered Nurse Certification Practice Exam

At what altitude does the human body start to typically experience significant pressure changes?

1. 5,000 ft

2. 10,000 ft

3. 15,000 ft

4. 20,000 ft

The correct answer is: 10,000 ft

The human body typically starts to experience significant pressure changes at around 10,000 feet. At this altitude, the decrease in atmospheric pressure can lead to various physiological responses, as the partial pressure of oxygen is reduced, making it more challenging for the body to obtain the oxygen it needs for optimal function. This reduction in oxygen availability can result in symptoms of altitude sickness, which may include headache, nausea, dizziness, and fatigue. Additionally, individual tolerance to altitude can vary widely, with some people beginning to feel the effects even at lower altitudes. While pressure changes and potential symptoms can start to be noted at altitudes lower than 10,000 feet, the significant impact on the body and the increased risk of altitude sickness is most commonly recognized starting at around this level. Understanding these physiological responses is essential for transport registered nurses as they assess and manage patient care in various altitudes.