Does endo- and (or) exocytosis require energy? Do they belong to active / passive transport?

Question

I expect vesicle formation and fusion to require energy input; however, I'm not sure about which of endocytosis and exocytosis require energy and how they use the energy input.Do they belong to active or passive transport?

Answer 1

Endocytosis and exocytosis are both active forms of transport across a cell membrane. Endocytosis has 3 classifications: phagocytosis, pinocytosis and receptor mediated endocytosis. Exocytosis is where cellular contents fuse with the cell membrane and they are actively expelled from the cell.