Endocytosis 胞吞, 內吞• In endocytosis, the cell takes in macromolecules byforming vesicles from the plasma membrane• Endocytosis is a reversal of exocytosis, involvingdifferent proteins• There are three types of endocytosis– Phagocytosis (“cellular eating”) 胞噬– Pinocytosis (“cellular drinking”) 胞飲– Receptor-mediated endocytosis