Final answer:
Vesicle transport regulates the movement of molecules into the cytoplasm through active transport processes known as endocytosis and exocytosis, requiring energy in the form of ATP.
Step-by-step explanation:
The movement of molecules into the cytoplasm is regulated by the process known as vesicle transport. This process involves active transport mechanisms that require cellular energy, typically in the form of adenosine triphosphate (ATP), to move substances against their concentration gradient. There are two main types of vesicle transport: endocytosis and exocytosis. During endocytosis, the cell's plasma membrane invaginates to form a pocket around the target particle, which then pinches off to form an internal vesicle. This type of active transport is used to move large molecules, parts of cells, or even whole cells into the cell. Conversely, exocytosis is used to transport materials out of the cell.