I am wondering how this works...
I think I know that when planes are parked on the ground, the "cabin alttitude" is equal to the "outside altitude". Then, when lifting off, cabin altitude goes up, but never as high as the "real outside altitude" (this is the point of the pressurized cabin, right?).
I also think I know that most modern planes have oxygen masks drop down when cabin altitude exceeds 10,000 ft.
Now what happens in the case of airliners flying to airports that are at altitudes higher than 10,000 ft (for instance, La Paz, Cuzco)? When arriving into these airports, cabin altitude will slowly near "real outside altitude", thus higher than 10,000 ft. Does that mean that when approaching a high altitude airport cabin pressure actually goes up, from its "artificial" pressurized level to the actual level of the airport? And since it will exceed 10,000 ft, will oxygen masks drop down? Or will people simply fade?
How does it concretely work in La Paz? I know that pilots wear oxygen masks, but what about pax? Masks, or risk to fade?
Thanks for any insights