Humber Admissions Practice Test

In which process do cells ingest liquid?

1. Phagocytosis

2. Exocytosis

3. Pinocytosis

4. Diffusion

The correct answer is: Pinocytosis

Pinocytosis is a specific type of endocytosis that involves the ingestion of liquid by cells. During this process, small invaginations of the cell membrane form vesicles, allowing the cell to take in extracellular fluid along with any dissolved substances present in that fluid. This is crucial for cells to absorb nutrients and maintain homeostasis, as it enables the uptake of necessary molecules and ions from their environment. In contrast, phagocytosis refers to the ingestion of large particles, such as bacteria or debris, while exocytosis involves the expulsion of materials from a cell. Diffusion, on the other hand, is a passive transport process that involves the movement of molecules from an area of higher concentration to an area of lower concentration, rather than the ingestion of liquid by the cell. Therefore, pinocytosis is the most accurate term for the process described in the question.