Which inherent stressor affects flight due to physical changes in the atmosphere?

The inherent stressor that affects flight due to physical changes in the atmosphere is barometric pressure change. When an aircraft ascends, the decrease in barometric pressure can lead to a variety of physiological effects on the human body. As altitude increases, the amount of oxygen in the air decreases, which can lead to hypoxia, a condition where the body's tissues do not receive enough oxygen. This change in pressure can also cause other issues, such as decompression sickness in unpressurized environments if the descent is not managed correctly.

Barometric pressure changes are significant during flight because they can influence not only the mechanics of the aircraft but also the health and performance of the crew and patients on board. Understanding this stressor is crucial for flight paramedics as it directly relates to the safety and efficacy of care provided in-flight.