These cellular structures are extensively modified during endocytosis and exocytosis.

The correct answer is - plasma membrane and vesicle.

Explanation:

Endocytosis is active transport that transfers particles, such as macromolecules, large cells, and others into a cell. The cell membrane or the plasma membrane surrounds to form a pocket or vesicle around the particular particle. The plasma membrane pinches off, leads to the particle contained newly created intracellular vesicle.

Exocytosis is the reverse of the endocytosis as waste material enveloped in the membrane to fuse with the internal plasma membrane which opens in the extracellular space.

Thus, the correct answer is - plasma membrane and vesicle.

not too sure but maybe in the hot springs.