What term refers to an aircraft pressurization system that maintains constant cabin pressure as altitude increases?

The term that refers to an aircraft pressurization system maintaining constant cabin pressure as altitude increases is "isobaric." In aerospace physiology, isobaric conditions suggest that the pressure within the cabin remains stable despite changes in external atmospheric pressure associated with altitude. This is essential for passenger comfort and safety, as it helps prevent hypoxia, which can occur due to lower oxygen levels at higher altitudes.

The isobaric system allows for a consistent pressure environment, which mitigates the physiological stresses on the body during climbs and descents. Understanding this concept is crucial for recognizing how modern aircraft provide a safe and comfortable flying experience by effectively managing the cabin pressure.

Other terms provided in the options describe different concepts related to pressure dynamics or control mechanisms in aircraft systems but do not specifically denote a system that maintains constant cabin pressure with increasing altitude.