The process used by cells to bring in large molecules is called endocytosis.

Here's a breakdown:

* Endocytosis is a process where the cell membrane engulfs a substance, creating a vesicle (a small, membrane-bound sac) that carries the substance into the cell.

There are three main types of endocytosis:

* Phagocytosis: "Cell eating" – The cell engulfs large particles, such as bacteria or debris.

* Pinocytosis: "Cell drinking" – The cell takes in smaller particles, including liquids, dissolved molecules, and even viruses.

* Receptor-mediated endocytosis: The cell uses specific receptor proteins on its surface to bind to and take in specific molecules.

Let me know if you'd like more detail on any of these types!