Here's a breakdown:
* Active transport refers to the movement of molecules across a cell membrane against their concentration gradient, meaning from a region of low concentration to a region of high concentration. This requires energy, typically supplied by ATP.
* Endocytosis is a type of active transport where the cell membrane engulfs a particle or substance, forming a vesicle that brings the material inside the cell.
There are different types of endocytosis, including:
* Phagocytosis: The engulfment of large solid particles like bacteria or cell debris.
* Pinocytosis: The engulfment of liquids and dissolved substances.
* Receptor-mediated endocytosis: A specific type of endocytosis where the cell membrane has receptors that bind to specific molecules, triggering the formation of a vesicle to bring those molecules into the cell.
Therefore, endocytosis is the overarching term for the active transport process of bringing food into cells.
