Where we hand over our passports is that immigration or passport control?

I would like to know the actual name for that place where as passengers out of a plane hand over our passports for the official to check whether we have a valid passport to enter a country is it immigration or passport control and what is QUARANTINE and also border controlWhere we hand over our passports is that immigration or passport control?
When you leave a country you pass through PassPort Control.


When you enter a country you go through Immigration.


Quarantine is when you enter a country you have to declare whether you are carrying certain items, such as fresh food, etc, as it may contain things which could cause the crops of that country grave damage.