Final answer:
The method used to supply passenger cabin supplemental oxygen is through the use of oxygen masks connected to an oxygen supply system. This ensures passengers receive enough oxygen during emergencies like a loss of cabin pressure.
Step-by-step explanation:
The method used to supply passenger cabin supplemental oxygen is typically through the use of oxygen masks. These masks are connected to an oxygen supply system that delivers pure oxygen to the passengers in case of emergencies, such as a loss of cabin pressure.
When there is a loss of cabin pressure, the oxygen masks automatically drop down from the overhead compartments. Passengers are instructed to put on their masks and breathe normally, as the oxygen supply will ensure they receive enough oxygen to breathe comfortably until the aircraft reaches a safe altitude or can make an emergency landing.
It is important to provide supplemental oxygen during emergencies because at high altitudes, the air pressure and oxygen levels are significantly lower, which can lead to hypoxia, a condition where the body doesn't receive enough oxygen. This can be life-threatening and can impair cognitive function and physical performance.