A cell takes in large molecules by forming a vesicle. Vesicles and vacuoles created during endocytosis are composed of plasma membrane. Endocytosis is a form of active transport because it requires energy in the form of ATP in order to occur.
In exocytosis, the cell exports bulky materials by containing them in a vesicle and expelling them through the cell membrane. Exocytosis is the reverse process of endocytosis.
When humans cry, exocytosis is used to expel a salty solution containing proteins.
Source: Concepts in Biology Twelfth Edition Eldon Enger, et al.