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A: Endocytosis and exocytosis are similar because they both allow patches of the membrane to flow from one compartment to another. According to Pearson Education, both processes require the cell to be dynamic instead of static.
Exocytosis and its counterpart, endocytosis, are used by all cells because most chemical substances important to them are large polar molecules that cannot pass through the hydrophobic portion of the cell membrane by passive means.