Answer
d. all of the above
Work Step by Step
Endocytosis, exocytosis, and phagocytosis all involve the actions of vesicles. In endocytosis, the membrane pinches around substances near the cell's surface, forming a vesicle that will take the substances into the cell. With exocytosis, a vesicle that has formed around a substance or substances within the cell travels to the cell's membrane, fuses with it, and then releases its contents to the outside of the cell. Phagocytosis is a type of endocytosis that traps debris, food, or foreign organisms outside of the cell within a vesicle. The vesicle then travels into the cell, meets up with a lysosome and fuses with it, allowing the digestive enzymes within the lysosome to break down the material within the vesicle.
