What is a real life example of excocytosis?

Excocytosis is- the transport of material out of a cell by means of a sac or vesicle that first engulfs the material and then is extruded through an opening in the cell membrane (distinguished from endocytosis).
 Simple examples-Pancreas releases insulin, neurons releasing electronic impulses.

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons

When scientist examine data such as historical documents, they are using the "scientific methods"