Fоr eаch оf the fоllowing sentences, fill in the blаnks with the best word or phrаse from the list provided. Eukaryotic cells continually take up materials from the extracellular space by the process of endocytosis, which involves utilizing clathrin as one of the [1] proteins to drive the formation of vesicles. One type of endocytosis is [2] which is used to uptake soluble materials in small vesicles. A second type of endocytosis is [3], which is used to uptake microorganisms and cellular debris in large vesicles. After these vesicles pinch off from the plasma membrane, they will fuse with the [4].